diff --git a/Oras.sln b/OrasProject.Oras.sln
similarity index 86%
rename from Oras.sln
rename to OrasProject.Oras.sln
index 549c1f2..4c86bf7 100644
--- a/Oras.sln
+++ b/OrasProject.Oras.sln
@@ -1,28 +1,28 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.0.31903.59
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Oras.Tests", "tests\OrasProject.Oras.Tests\Oras.Tests.csproj", "{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OrasProject.Oras", "src\OrasProject.Oras\OrasProject.Oras.csproj", "{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}.Release|Any CPU.Build.0 = Release|Any CPU
-		{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OrasProject.Oras.Tests", "tests\OrasProject.Oras.Tests\OrasProject.Oras.Tests.csproj", "{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "OrasProject.Oras", "src\OrasProject.Oras\OrasProject.Oras.csproj", "{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{70DFCE13-53AA-4CC2-8E1A-F73A1344A0CB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{547F152F-6F4D-4E5A-AD3A-C3BC5CDCFD27}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal
diff --git a/src/OrasProject.Oras/Constants/DockerMediaTypes.cs b/src/OrasProject.Oras/Constants/DockerMediaTypes.cs
index 0d3ebc0..e9067a1 100644
--- a/src/OrasProject.Oras/Constants/DockerMediaTypes.cs
+++ b/src/OrasProject.Oras/Constants/DockerMediaTypes.cs
@@ -1,4 +1,4 @@
-namespace Oras.Constants
+namespace OrasProject.Oras.Constants
 {
     public static class DockerMediaTypes
     {
diff --git a/src/OrasProject.Oras/Constants/OCIMediaTypes .cs b/src/OrasProject.Oras/Constants/OCIMediaTypes .cs
index d734dbd..328a43f 100644
--- a/src/OrasProject.Oras/Constants/OCIMediaTypes .cs	
+++ b/src/OrasProject.Oras/Constants/OCIMediaTypes .cs	
@@ -1,4 +1,4 @@
-namespace Oras.Constants
+namespace OrasProject.Oras.Constants
 {
     public static class OCIMediaTypes
     {
diff --git a/src/OrasProject.Oras/Content/Content.cs b/src/OrasProject.Oras/Content/Content.cs
index 91954b0..9b26def 100644
--- a/src/OrasProject.Oras/Content/Content.cs
+++ b/src/OrasProject.Oras/Content/Content.cs
@@ -1,7 +1,7 @@
-using Oras.Constants;
-using Oras.Exceptions;
-using Oras.Interfaces;
-using Oras.Models;
+using OrasProject.Oras.Exceptions;
+using OrasProject.Oras.Interfaces;
+using OrasProject.Oras.Models;
+using OrasProject.Oras.Constants;
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -9,9 +9,9 @@
 using System.Text.Json;
 using System.Threading;
 using System.Threading.Tasks;
-using Index = Oras.Models.Index;
+using Index = OrasProject.Oras.Models.Index;
 
-namespace Oras.Content
+namespace OrasProject.Oras.Content
 {
     public static class Content
     {
@@ -55,7 +55,7 @@ public static async Task<IList<Descriptor>> SuccessorsAsync(IFetcher fetcher, De
         /// <param name="desc"></param>
         /// <param name="cancellationToken"></param>
         /// <returns></returns>
-        public static async Task<Byte[]> FetchAllAsync(IFetcher fetcher, Descriptor desc, CancellationToken cancellationToken)
+        public static async Task<byte[]> FetchAllAsync(IFetcher fetcher, Descriptor desc, CancellationToken cancellationToken)
         {
             var stream = await fetcher.FetchAsync(desc, cancellationToken);
             return await ReadAllAsync(stream, desc);
diff --git a/src/OrasProject.Oras/Content/DigestUtility.cs b/src/OrasProject.Oras/Content/DigestUtility.cs
index 1f384ae..8a485e3 100644
--- a/src/OrasProject.Oras/Content/DigestUtility.cs
+++ b/src/OrasProject.Oras/Content/DigestUtility.cs
@@ -1,9 +1,9 @@
-using Oras.Exceptions;
+using OrasProject.Oras.Exceptions;
 using System;
 using System.Security.Cryptography;
 using System.Text.RegularExpressions;
 
-namespace Oras.Content
+namespace OrasProject.Oras.Content
 {
     internal static class DigestUtility
     {
diff --git a/src/OrasProject.Oras/Copy.cs b/src/OrasProject.Oras/Copy.cs
index 305619e..8e14bc3 100644
--- a/src/OrasProject.Oras/Copy.cs
+++ b/src/OrasProject.Oras/Copy.cs
@@ -1,11 +1,11 @@
-using Oras.Interfaces;
-using Oras.Models;
+using OrasProject.Oras.Interfaces;
+using OrasProject.Oras.Models;
 using System;
 using System.Threading;
 using System.Threading.Tasks;
-using static Oras.Content.Content;
+using static OrasProject.Oras.Content.Content;
 
-namespace Oras
+namespace OrasProject.Oras
 {
     public class Copy
     {
diff --git a/src/OrasProject.Oras/Exceptions/AlreadyExistsException.cs b/src/OrasProject.Oras/Exceptions/AlreadyExistsException.cs
index ebfcb2e..05efe5b 100644
--- a/src/OrasProject.Oras/Exceptions/AlreadyExistsException.cs
+++ b/src/OrasProject.Oras/Exceptions/AlreadyExistsException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// AlreadyExistsException is thrown when a resource already exists.
diff --git a/src/OrasProject.Oras/Exceptions/InvalidDescriptorSizeException.cs b/src/OrasProject.Oras/Exceptions/InvalidDescriptorSizeException.cs
index cd48a19..a07caa8 100644
--- a/src/OrasProject.Oras/Exceptions/InvalidDescriptorSizeException.cs
+++ b/src/OrasProject.Oras/Exceptions/InvalidDescriptorSizeException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// InvalidDescriptorSizeException is thrown when a descriptor size is invalid.
diff --git a/src/OrasProject.Oras/Exceptions/InvalidDigestException.cs b/src/OrasProject.Oras/Exceptions/InvalidDigestException.cs
index 47eae63..4da6338 100644
--- a/src/OrasProject.Oras/Exceptions/InvalidDigestException.cs
+++ b/src/OrasProject.Oras/Exceptions/InvalidDigestException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// InvalidDigestException is thrown when a digest is invalid.
diff --git a/src/OrasProject.Oras/Exceptions/InvalidReferenceException.cs b/src/OrasProject.Oras/Exceptions/InvalidReferenceException.cs
index 815b118..7a5735d 100644
--- a/src/OrasProject.Oras/Exceptions/InvalidReferenceException.cs
+++ b/src/OrasProject.Oras/Exceptions/InvalidReferenceException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// InvalidReferenceException is thrown when the reference is invlid
diff --git a/src/OrasProject.Oras/Exceptions/MismatchedDigestException.cs b/src/OrasProject.Oras/Exceptions/MismatchedDigestException.cs
index 005c17b..08b0f1a 100644
--- a/src/OrasProject.Oras/Exceptions/MismatchedDigestException.cs
+++ b/src/OrasProject.Oras/Exceptions/MismatchedDigestException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// MismatchedDigestException is thrown when a digest does not match the content.
diff --git a/src/OrasProject.Oras/Exceptions/MissingReferenceException.cs b/src/OrasProject.Oras/Exceptions/MissingReferenceException.cs
index 3fab90e..8f1f0a6 100644
--- a/src/OrasProject.Oras/Exceptions/MissingReferenceException.cs
+++ b/src/OrasProject.Oras/Exceptions/MissingReferenceException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// MissingReferenceException is thrown when a reference is missing.
diff --git a/src/OrasProject.Oras/Exceptions/NotFoundException.cs b/src/OrasProject.Oras/Exceptions/NotFoundException.cs
index 2c486b9..11c991d 100644
--- a/src/OrasProject.Oras/Exceptions/NotFoundException.cs
+++ b/src/OrasProject.Oras/Exceptions/NotFoundException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// NotFoundException is thrown when a resource is not found.
diff --git a/src/OrasProject.Oras/Exceptions/SizeExceedsLimitException.cs b/src/OrasProject.Oras/Exceptions/SizeExceedsLimitException.cs
index cfa0baa..5115605 100644
--- a/src/OrasProject.Oras/Exceptions/SizeExceedsLimitException.cs
+++ b/src/OrasProject.Oras/Exceptions/SizeExceedsLimitException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// SizeExceedsLimitException is thrown when a size exceeds the limit.
diff --git a/src/OrasProject.Oras/Exceptions/UnsupportedException.cs b/src/OrasProject.Oras/Exceptions/UnsupportedException.cs
index 1d7fa7e..99bf294 100644
--- a/src/OrasProject.Oras/Exceptions/UnsupportedException.cs
+++ b/src/OrasProject.Oras/Exceptions/UnsupportedException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     /// <summary>
     /// UnsupportedException is thrown when a feature is not supported.
diff --git a/src/OrasProject.Oras/Exceptions/UnsupportedVersionException.cs b/src/OrasProject.Oras/Exceptions/UnsupportedVersionException.cs
index 5b7857d..3c15723 100644
--- a/src/OrasProject.Oras/Exceptions/UnsupportedVersionException.cs
+++ b/src/OrasProject.Oras/Exceptions/UnsupportedVersionException.cs
@@ -1,6 +1,6 @@
 using System;
 
-namespace Oras.Exceptions
+namespace OrasProject.Oras.Exceptions
 {
     public class UnsupportedVersionException : Exception
     {
diff --git a/src/OrasProject.Oras/Interfaces/IDeleter.cs b/src/OrasProject.Oras/Interfaces/IDeleter.cs
index 8c46404..a8220fd 100644
--- a/src/OrasProject.Oras/Interfaces/IDeleter.cs
+++ b/src/OrasProject.Oras/Interfaces/IDeleter.cs
@@ -1,8 +1,8 @@
-using Oras.Models;
+using OrasProject.Oras.Models;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// IDeleter removes content.
diff --git a/src/OrasProject.Oras/Interfaces/IFetcher.cs b/src/OrasProject.Oras/Interfaces/IFetcher.cs
index e63511c..ed2e634 100644
--- a/src/OrasProject.Oras/Interfaces/IFetcher.cs
+++ b/src/OrasProject.Oras/Interfaces/IFetcher.cs
@@ -1,9 +1,9 @@
-using Oras.Models;
+using OrasProject.Oras.Models;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// IFetcher fetches content.
diff --git a/src/OrasProject.Oras/Interfaces/IReadOnlyStorage.cs b/src/OrasProject.Oras/Interfaces/IReadOnlyStorage.cs
index ccb2af2..5f191d3 100644
--- a/src/OrasProject.Oras/Interfaces/IReadOnlyStorage.cs
+++ b/src/OrasProject.Oras/Interfaces/IReadOnlyStorage.cs
@@ -1,8 +1,8 @@
-using Oras.Models;
+using OrasProject.Oras.Models;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// IReadOnlyStorage represents a read-only Storage.
diff --git a/src/OrasProject.Oras/Interfaces/IReadOnlyTarget.cs b/src/OrasProject.Oras/Interfaces/IReadOnlyTarget.cs
index f7ada16..ad6948e 100644
--- a/src/OrasProject.Oras/Interfaces/IReadOnlyTarget.cs
+++ b/src/OrasProject.Oras/Interfaces/IReadOnlyTarget.cs
@@ -1,4 +1,4 @@
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// IReadOnlyTarget represents a read-only Target.
diff --git a/src/OrasProject.Oras/Interfaces/IResolver.cs b/src/OrasProject.Oras/Interfaces/IResolver.cs
index 73dc57e..1f0f40f 100644
--- a/src/OrasProject.Oras/Interfaces/IResolver.cs
+++ b/src/OrasProject.Oras/Interfaces/IResolver.cs
@@ -1,8 +1,8 @@
-using Oras.Models;
+using OrasProject.Oras.Models;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// IResolver resolves reference tags.
diff --git a/src/OrasProject.Oras/Interfaces/IStorage.cs b/src/OrasProject.Oras/Interfaces/IStorage.cs
index 522201a..19cfaa6 100644
--- a/src/OrasProject.Oras/Interfaces/IStorage.cs
+++ b/src/OrasProject.Oras/Interfaces/IStorage.cs
@@ -1,9 +1,9 @@
-using Oras.Models;
+using OrasProject.Oras.Models;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// IStorage represents a content-addressable storage (CAS) where contents are accessed via Descriptors.
diff --git a/src/OrasProject.Oras/Interfaces/ITagResolver.cs b/src/OrasProject.Oras/Interfaces/ITagResolver.cs
index cae2cfd..3ec6865 100644
--- a/src/OrasProject.Oras/Interfaces/ITagResolver.cs
+++ b/src/OrasProject.Oras/Interfaces/ITagResolver.cs
@@ -1,4 +1,4 @@
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// ITagResolver provides reference tag indexing services.
diff --git a/src/OrasProject.Oras/Interfaces/ITagger.cs b/src/OrasProject.Oras/Interfaces/ITagger.cs
index c3146a0..044087d 100644
--- a/src/OrasProject.Oras/Interfaces/ITagger.cs
+++ b/src/OrasProject.Oras/Interfaces/ITagger.cs
@@ -1,8 +1,8 @@
-using Oras.Models;
+using OrasProject.Oras.Models;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// ITagger tags reference tags
diff --git a/src/OrasProject.Oras/Interfaces/ITarget.cs b/src/OrasProject.Oras/Interfaces/ITarget.cs
index d836e1f..19ab198 100644
--- a/src/OrasProject.Oras/Interfaces/ITarget.cs
+++ b/src/OrasProject.Oras/Interfaces/ITarget.cs
@@ -1,4 +1,4 @@
-namespace Oras.Interfaces
+namespace OrasProject.Oras.Interfaces
 {
     /// <summary>
     /// Target is a CAS with generic tags
diff --git a/src/OrasProject.Oras/Interfaces/Registry/IBlobStore.cs b/src/OrasProject.Oras/Interfaces/Registry/IBlobStore.cs
index cedada4..e2ae676 100644
--- a/src/OrasProject.Oras/Interfaces/Registry/IBlobStore.cs
+++ b/src/OrasProject.Oras/Interfaces/Registry/IBlobStore.cs
@@ -1,4 +1,4 @@
-namespace Oras.Interfaces.Registry
+namespace OrasProject.Oras.Interfaces.Registry
 {
     /// <summary>
     /// IBlobStore is a CAS with the ability to stat and delete its content.
diff --git a/src/OrasProject.Oras/Interfaces/Registry/IManifestStore.cs b/src/OrasProject.Oras/Interfaces/Registry/IManifestStore.cs
index 5d73b6b..b9d3f86 100644
--- a/src/OrasProject.Oras/Interfaces/Registry/IManifestStore.cs
+++ b/src/OrasProject.Oras/Interfaces/Registry/IManifestStore.cs
@@ -1,4 +1,4 @@
-namespace Oras.Interfaces.Registry
+namespace OrasProject.Oras.Interfaces.Registry
 {
     /// <summary>
     /// IManifestStore is a CAS with the ability to stat and delete its content.
diff --git a/src/OrasProject.Oras/Interfaces/Registry/IReferenceFetcher.cs b/src/OrasProject.Oras/Interfaces/Registry/IReferenceFetcher.cs
index d13a680..ea6030f 100644
--- a/src/OrasProject.Oras/Interfaces/Registry/IReferenceFetcher.cs
+++ b/src/OrasProject.Oras/Interfaces/Registry/IReferenceFetcher.cs
@@ -1,9 +1,9 @@
-using Oras.Models;
+using OrasProject.Oras.Models;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces.Registry
+namespace OrasProject.Oras.Interfaces.Registry
 {
     /// <summary>
     /// IReferenceFetcher provides advanced fetch with the tag service.
diff --git a/src/OrasProject.Oras/Interfaces/Registry/IReferencePusher.cs b/src/OrasProject.Oras/Interfaces/Registry/IReferencePusher.cs
index cb21b0a..7953290 100644
--- a/src/OrasProject.Oras/Interfaces/Registry/IReferencePusher.cs
+++ b/src/OrasProject.Oras/Interfaces/Registry/IReferencePusher.cs
@@ -1,9 +1,9 @@
-using Oras.Models;
+using OrasProject.Oras.Models;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces.Registry
+namespace OrasProject.Oras.Interfaces.Registry
 {
     /// <summary>
     /// IReferencePusher provides advanced push with the tag service.
diff --git a/src/OrasProject.Oras/Interfaces/Registry/IRegistry.cs b/src/OrasProject.Oras/Interfaces/Registry/IRegistry.cs
index df7a890..da7655c 100644
--- a/src/OrasProject.Oras/Interfaces/Registry/IRegistry.cs
+++ b/src/OrasProject.Oras/Interfaces/Registry/IRegistry.cs
@@ -2,7 +2,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces.Registry
+namespace OrasProject.Oras.Interfaces.Registry
 {
     public interface IRegistry
     {
diff --git a/src/OrasProject.Oras/Interfaces/Registry/IRepository.cs b/src/OrasProject.Oras/Interfaces/Registry/IRepository.cs
index 9edeed4..82a28c5 100644
--- a/src/OrasProject.Oras/Interfaces/Registry/IRepository.cs
+++ b/src/OrasProject.Oras/Interfaces/Registry/IRepository.cs
@@ -1,4 +1,4 @@
-namespace Oras.Interfaces.Registry
+namespace OrasProject.Oras.Interfaces.Registry
 {
     /// <summary>
     /// Repository is an ORAS target and an union of the blob and the manifest CASs.
diff --git a/src/OrasProject.Oras/Interfaces/Registry/IRepositoryOption.cs b/src/OrasProject.Oras/Interfaces/Registry/IRepositoryOption.cs
index 80b4693..781ea15 100644
--- a/src/OrasProject.Oras/Interfaces/Registry/IRepositoryOption.cs
+++ b/src/OrasProject.Oras/Interfaces/Registry/IRepositoryOption.cs
@@ -1,7 +1,7 @@
-using Oras.Remote;
+using OrasProject.Oras.Remote;
 using System.Net.Http;
 
-namespace Oras.Interfaces.Registry
+namespace OrasProject.Oras.Interfaces.Registry
 {
     /// <summary>
     /// IRepositoryOption is used to configure a remote repository.
diff --git a/src/OrasProject.Oras/Interfaces/Registry/ITagLister.cs b/src/OrasProject.Oras/Interfaces/Registry/ITagLister.cs
index a273127..5577552 100644
--- a/src/OrasProject.Oras/Interfaces/Registry/ITagLister.cs
+++ b/src/OrasProject.Oras/Interfaces/Registry/ITagLister.cs
@@ -2,7 +2,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Interfaces.Registry
+namespace OrasProject.Oras.Interfaces.Registry
 {
     /// <summary>
     /// ITagLister lists tags by the tag service.
diff --git a/src/OrasProject.Oras/Memory/MemoryGraph.cs b/src/OrasProject.Oras/Memory/MemoryGraph.cs
index 0a2c178..1862d22 100644
--- a/src/OrasProject.Oras/Memory/MemoryGraph.cs
+++ b/src/OrasProject.Oras/Memory/MemoryGraph.cs
@@ -1,13 +1,13 @@
-using Oras.Interfaces;
-using Oras.Models;
+using OrasProject.Oras.Interfaces;
+using OrasProject.Oras.Models;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using static Oras.Content.Content;
+using static OrasProject.Oras.Content.Content;
 
-namespace Oras.Memory
+namespace OrasProject.Oras.Memory
 {
     internal class MemoryGraph
     {
diff --git a/src/OrasProject.Oras/Memory/MemoryStorage.cs b/src/OrasProject.Oras/Memory/MemoryStorage.cs
index f95e59f..bba02b1 100644
--- a/src/OrasProject.Oras/Memory/MemoryStorage.cs
+++ b/src/OrasProject.Oras/Memory/MemoryStorage.cs
@@ -1,13 +1,13 @@
-using Oras.Exceptions;
-using Oras.Interfaces;
-using Oras.Models;
+using OrasProject.Oras.Exceptions;
+using OrasProject.Oras.Interfaces;
+using OrasProject.Oras.Models;
 using System.Collections.Concurrent;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
-using static Oras.Content.Content;
+using static OrasProject.Oras.Content.Content;
 
-namespace Oras.Memory
+namespace OrasProject.Oras.Memory
 {
     internal class MemoryStorage : IStorage
     {
diff --git a/src/OrasProject.Oras/Memory/MemoryTagResolver.cs b/src/OrasProject.Oras/Memory/MemoryTagResolver.cs
index 5f3a3fc..7e09ea8 100644
--- a/src/OrasProject.Oras/Memory/MemoryTagResolver.cs
+++ b/src/OrasProject.Oras/Memory/MemoryTagResolver.cs
@@ -1,11 +1,11 @@
-using Oras.Exceptions;
-using Oras.Interfaces;
-using Oras.Models;
+using OrasProject.Oras.Exceptions;
+using OrasProject.Oras.Interfaces;
+using OrasProject.Oras.Models;
 using System.Collections.Concurrent;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Memory
+namespace OrasProject.Oras.Memory
 {
     internal class MemoryTagResolver : ITagResolver
     {
diff --git a/src/OrasProject.Oras/Memory/MemoryTarget.cs b/src/OrasProject.Oras/Memory/MemoryTarget.cs
index 2c16c76..139be9a 100644
--- a/src/OrasProject.Oras/Memory/MemoryTarget.cs
+++ b/src/OrasProject.Oras/Memory/MemoryTarget.cs
@@ -1,12 +1,12 @@
-using Oras.Exceptions;
-using Oras.Interfaces;
-using Oras.Models;
+using OrasProject.Oras.Exceptions;
+using OrasProject.Oras.Interfaces;
+using OrasProject.Oras.Models;
 using System.Collections.Generic;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace Oras.Memory
+namespace OrasProject.Oras.Memory
 {
     public class MemoryTarget : ITarget
     {
diff --git a/src/OrasProject.Oras/Models/Descriptor.cs b/src/OrasProject.Oras/Models/Descriptor.cs
index 2ef549b..748f18b 100644
--- a/src/OrasProject.Oras/Models/Descriptor.cs
+++ b/src/OrasProject.Oras/Models/Descriptor.cs
@@ -2,7 +2,7 @@
 using System.Text.Json.Serialization;
 
 
-namespace Oras.Models
+namespace OrasProject.Oras.Models
 {
     public class Descriptor
     {
diff --git a/src/OrasProject.Oras/Models/Index.cs b/src/OrasProject.Oras/Models/Index.cs
index 04143f7..9d5e435 100644
--- a/src/OrasProject.Oras/Models/Index.cs
+++ b/src/OrasProject.Oras/Models/Index.cs
@@ -1,7 +1,7 @@
 using System.Collections.Generic;
 using System.Text.Json.Serialization;
 
-namespace Oras.Models
+namespace OrasProject.Oras.Models
 {
     public class Index
     {
diff --git a/src/OrasProject.Oras/Models/Manifest.cs b/src/OrasProject.Oras/Models/Manifest.cs
index e757214..14d6db3 100644
--- a/src/OrasProject.Oras/Models/Manifest.cs
+++ b/src/OrasProject.Oras/Models/Manifest.cs
@@ -1,7 +1,7 @@
 using System.Collections.Generic;
 using System.Text.Json.Serialization;
 
-namespace Oras.Models
+namespace OrasProject.Oras.Models
 {
     public class Manifest
     {
diff --git a/src/OrasProject.Oras/Models/MinimumDescriptor.cs b/src/OrasProject.Oras/Models/MinimumDescriptor.cs
index 2665d24..39726e4 100644
--- a/src/OrasProject.Oras/Models/MinimumDescriptor.cs
+++ b/src/OrasProject.Oras/Models/MinimumDescriptor.cs
@@ -2,7 +2,7 @@
 using System.Text.Json.Serialization;
 
 
-namespace Oras.Models
+namespace OrasProject.Oras.Models
 {
     internal class MinimumDescriptor : IEquatable<MinimumDescriptor>
     {
diff --git a/src/OrasProject.Oras/OrasProject.Oras.csproj b/src/OrasProject.Oras/OrasProject.Oras.csproj
index 40edc54..b987556 100644
--- a/src/OrasProject.Oras/OrasProject.Oras.csproj
+++ b/src/OrasProject.Oras/OrasProject.Oras.csproj
@@ -13,7 +13,7 @@
 	</PropertyGroup>
 	<ItemGroup>
 		<AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleToAttribute">
-			<_Parameter1>Oras.Tests</_Parameter1>
+			<_Parameter1>OrasProject.Oras.Tests</_Parameter1>
 		</AssemblyAttribute>
 	</ItemGroup>
 	<ItemGroup>
diff --git a/src/OrasProject.Oras/Remote/Auth/HttpClientWithBasicAuth.cs b/src/OrasProject.Oras/Remote/Auth/HttpClientWithBasicAuth.cs
index 5acb00b..07031c0 100644
--- a/src/OrasProject.Oras/Remote/Auth/HttpClientWithBasicAuth.cs
+++ b/src/OrasProject.Oras/Remote/Auth/HttpClientWithBasicAuth.cs
@@ -3,7 +3,7 @@
 using System.Net.Http.Headers;
 using System.Text;
 
-namespace Oras.Remote.Auth
+namespace OrasProject.Oras.Remote.Auth
 {
     /// <summary>
     /// HttpClientWithBasicAuth adds the Basic Auth Scheme to the Authorization Header
diff --git a/src/OrasProject.Oras/Remote/ErrorUtility.cs b/src/OrasProject.Oras/Remote/ErrorUtility.cs
index ef0a163..be77e20 100644
--- a/src/OrasProject.Oras/Remote/ErrorUtility.cs
+++ b/src/OrasProject.Oras/Remote/ErrorUtility.cs
@@ -2,7 +2,7 @@
 using System.Net.Http;
 using System.Threading.Tasks;
 
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
     internal class ErrorUtility
     {
diff --git a/src/OrasProject.Oras/Remote/HttpClientExtensions.cs b/src/OrasProject.Oras/Remote/HttpClientExtensions.cs
index 63c488a..8d209c6 100644
--- a/src/OrasProject.Oras/Remote/HttpClientExtensions.cs
+++ b/src/OrasProject.Oras/Remote/HttpClientExtensions.cs
@@ -1,6 +1,6 @@
 using System.Net.Http;
 
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
     internal static class HttpClientExtensions
     {
diff --git a/src/OrasProject.Oras/Remote/LinkUtility.cs b/src/OrasProject.Oras/Remote/LinkUtility.cs
index 5482c53..2999c4e 100644
--- a/src/OrasProject.Oras/Remote/LinkUtility.cs
+++ b/src/OrasProject.Oras/Remote/LinkUtility.cs
@@ -2,7 +2,7 @@
 using System.Linq;
 using System.Net.Http;
 
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
     internal class LinkUtility
     {
diff --git a/src/OrasProject.Oras/Remote/ManifestUtility.cs b/src/OrasProject.Oras/Remote/ManifestUtility.cs
index af6a2b4..4e5baa6 100644
--- a/src/OrasProject.Oras/Remote/ManifestUtility.cs
+++ b/src/OrasProject.Oras/Remote/ManifestUtility.cs
@@ -1,8 +1,8 @@
-using Oras.Constants;
-using Oras.Models;
+using OrasProject.Oras.Models;
+using OrasProject.Oras.Constants;
 using System.Linq;
 
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
     internal static class ManifestUtility
     {
diff --git a/src/OrasProject.Oras/Remote/Registry.cs b/src/OrasProject.Oras/Remote/Registry.cs
index 4fa7c3d..1931971 100644
--- a/src/OrasProject.Oras/Remote/Registry.cs
+++ b/src/OrasProject.Oras/Remote/Registry.cs
@@ -1,5 +1,5 @@
-using Oras.Exceptions;
-using Oras.Interfaces.Registry;
+using OrasProject.Oras.Exceptions;
+using OrasProject.Oras.Interfaces.Registry;
 using System;
 using System.Net;
 using System.Net.Http;
@@ -8,7 +8,7 @@
 using System.Threading.Tasks;
 using static System.Web.HttpUtility;
 
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
     public class Registry : IRegistry, IRepositoryOption
     {
diff --git a/src/OrasProject.Oras/Remote/RemoteReference.cs b/src/OrasProject.Oras/Remote/RemoteReference.cs
index 2d4aef2..a42a19d 100644
--- a/src/OrasProject.Oras/Remote/RemoteReference.cs
+++ b/src/OrasProject.Oras/Remote/RemoteReference.cs
@@ -1,10 +1,10 @@
-using Oras.Content;
-using Oras.Exceptions;
+using OrasProject.Oras.Content;
+using OrasProject.Oras.Exceptions;
 using System;
 using System.Net.NetworkInformation;
 using System.Text.RegularExpressions;
 
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
     public class RemoteReference
     {
diff --git a/src/OrasProject.Oras/Remote/Repository.cs b/src/OrasProject.Oras/Remote/Repository.cs
index af34353..e41334a 100644
--- a/src/OrasProject.Oras/Remote/Repository.cs
+++ b/src/OrasProject.Oras/Remote/Repository.cs
@@ -1,7 +1,7 @@
-using Oras.Content;
-using Oras.Exceptions;
-using Oras.Interfaces.Registry;
-using Oras.Models;
+using OrasProject.Oras.Content;
+using OrasProject.Oras.Exceptions;
+using OrasProject.Oras.Interfaces.Registry;
+using OrasProject.Oras.Models;
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -13,7 +13,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 using static System.Web.HttpUtility;
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
 
     /// <summary>
diff --git a/src/OrasProject.Oras/Remote/ResponseTypes.cs b/src/OrasProject.Oras/Remote/ResponseTypes.cs
index 0fdf200..3e1f2e8 100644
--- a/src/OrasProject.Oras/Remote/ResponseTypes.cs
+++ b/src/OrasProject.Oras/Remote/ResponseTypes.cs
@@ -1,6 +1,6 @@
 using System.Text.Json.Serialization;
 
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
     internal static class ResponseTypes
     {
diff --git a/src/OrasProject.Oras/Remote/URLUtiliity.cs b/src/OrasProject.Oras/Remote/URLUtiliity.cs
index 45f5b08..69c1b38 100644
--- a/src/OrasProject.Oras/Remote/URLUtiliity.cs
+++ b/src/OrasProject.Oras/Remote/URLUtiliity.cs
@@ -1,4 +1,4 @@
-namespace Oras.Remote
+namespace OrasProject.Oras.Remote
 {
 
     internal static class URLUtiliity
diff --git a/tests/OrasProject.Oras.Tests/ContentTest/ContentTest.cs b/tests/OrasProject.Oras.Tests/ContentTest/ContentTest.cs
index 8a04981..69b1b56 100644
--- a/tests/OrasProject.Oras.Tests/ContentTest/ContentTest.cs
+++ b/tests/OrasProject.Oras.Tests/ContentTest/ContentTest.cs
@@ -1,8 +1,8 @@
 using System.Text;
 using Xunit;
-using static Oras.Content.Content;
+using static OrasProject.Oras.Content.Content;
 
-namespace Oras.Tests.ContentTest
+namespace OrasProject.Oras.Tests.ContentTest
 {
     public class CalculateDigest
     {
diff --git a/tests/OrasProject.Oras.Tests/CopyTest.cs b/tests/OrasProject.Oras.Tests/CopyTest.cs
index a759eae..fdb0c1c 100644
--- a/tests/OrasProject.Oras.Tests/CopyTest.cs
+++ b/tests/OrasProject.Oras.Tests/CopyTest.cs
@@ -1,12 +1,13 @@
-using Oras.Constants;
-using Oras.Memory;
-using Oras.Models;
+using OrasProject.Oras.Memory;
+using OrasProject.Oras.Models;
+using OrasProject.Oras;
+using OrasProject.Oras.Constants;
 using System.Text;
 using System.Text.Json;
 using Xunit;
-using static Oras.Content.Content;
+using static OrasProject.Oras.Content.Content;
 
-namespace Oras.Tests
+namespace OrasProject.Oras.Tests
 {
     public class CopyTest
     {
diff --git a/tests/OrasProject.Oras.Tests/MemoryTest/MemoryTargetTest.cs b/tests/OrasProject.Oras.Tests/MemoryTest/MemoryTargetTest.cs
index a4a26ad..cb8fdad 100644
--- a/tests/OrasProject.Oras.Tests/MemoryTest/MemoryTargetTest.cs
+++ b/tests/OrasProject.Oras.Tests/MemoryTest/MemoryTargetTest.cs
@@ -1,14 +1,14 @@
-using Oras.Constants;
-using Oras.Exceptions;
-using Oras.Memory;
-using Oras.Models;
+using OrasProject.Oras.Exceptions;
+using OrasProject.Oras.Memory;
+using OrasProject.Oras.Models;
+using OrasProject.Oras.Constants;
 using System.Text;
 using System.Text.Json;
 using Xunit;
-using static Oras.Content.Content;
-using Index = Oras.Models.Index;
+using static OrasProject.Oras.Content.Content;
+using Index = OrasProject.Oras.Models.Index;
 
-namespace Oras.Tests.MemoryTest
+namespace OrasProject.Oras.Tests.MemoryTest
 {
     public class MemoryTargetTest
     {
diff --git a/tests/OrasProject.Oras.Tests/Oras.Tests.csproj b/tests/OrasProject.Oras.Tests/OrasProject.Oras.Tests.csproj
similarity index 100%
rename from tests/OrasProject.Oras.Tests/Oras.Tests.csproj
rename to tests/OrasProject.Oras.Tests/OrasProject.Oras.Tests.csproj
diff --git a/tests/OrasProject.Oras.Tests/RemoteTest/AuthTest.cs b/tests/OrasProject.Oras.Tests/RemoteTest/AuthTest.cs
index 8afac9a..ec23970 100644
--- a/tests/OrasProject.Oras.Tests/RemoteTest/AuthTest.cs
+++ b/tests/OrasProject.Oras.Tests/RemoteTest/AuthTest.cs
@@ -1,12 +1,12 @@
 using Moq;
 using Moq.Protected;
-using Oras.Remote;
-using Oras.Remote.Auth;
+using OrasProject.Oras.Remote;
+using OrasProject.Oras.Remote.Auth;
 using System.Net;
 using System.Text;
 using Xunit;
 
-namespace Oras.Tests.RemoteTest
+namespace OrasProject.Oras.Tests.RemoteTest
 {
     public class AuthTest
     {
diff --git a/tests/OrasProject.Oras.Tests/RemoteTest/RegistryTest.cs b/tests/OrasProject.Oras.Tests/RemoteTest/RegistryTest.cs
index 03454f9..b2731c4 100644
--- a/tests/OrasProject.Oras.Tests/RemoteTest/RegistryTest.cs
+++ b/tests/OrasProject.Oras.Tests/RemoteTest/RegistryTest.cs
@@ -1,12 +1,12 @@
 using Moq;
 using Moq.Protected;
-using Oras.Remote;
+using OrasProject.Oras.Remote;
 using System.Net;
 using System.Text.Json;
 using System.Text.RegularExpressions;
 using Xunit;
 
-namespace Oras.Tests.RemoteTest
+namespace OrasProject.Oras.Tests.RemoteTest
 {
     public class RegistryTest
     {
@@ -36,23 +36,23 @@ public async Task PingAsync()
                 res.RequestMessage = req;
 
                 if (req.Method != HttpMethod.Get && req.RequestUri?.AbsolutePath == $"/v2/")
-                {
-                    res.StatusCode = HttpStatusCode.NotFound;
+                {
+                    res.StatusCode = HttpStatusCode.NotFound;
                     return res;
                 }
 
-                if (V2Implemented)
-                {
-                    res.StatusCode = HttpStatusCode.OK;
-                    return res;
-                }
-                else
-                {
-                    res.StatusCode = HttpStatusCode.NotFound;
-                    return res;
+                if (V2Implemented)
+                {
+                    res.StatusCode = HttpStatusCode.OK;
+                    return res;
+                }
+                else
+                {
+                    res.StatusCode = HttpStatusCode.NotFound;
+                    return res;
                 }
             };
-            var registry = new Oras.Remote.Registry("localhost:5000");
+            var registry = new OrasProject.Oras.Remote.Registry("localhost:5000");
             registry.PlainHTTP = true;
             registry.HttpClient = CustomClient(func);
             var cancellationToken = new CancellationToken();
@@ -125,7 +125,7 @@ public async Task Repositories()
 
             };
 
-            var registry = new Oras.Remote.Registry("localhost:5000");
+            var registry = new OrasProject.Oras.Remote.Registry("localhost:5000");
             registry.PlainHTTP = true;
             registry.HttpClient = CustomClient(func);
             var cancellationToken = new CancellationToken();
diff --git a/tests/OrasProject.Oras.Tests/RemoteTest/RepositoryTest.cs b/tests/OrasProject.Oras.Tests/RemoteTest/RepositoryTest.cs
index 47e4e5b..a3e7cf0 100644
--- a/tests/OrasProject.Oras.Tests/RemoteTest/RepositoryTest.cs
+++ b/tests/OrasProject.Oras.Tests/RemoteTest/RepositoryTest.cs
@@ -1,10 +1,11 @@
 using Moq;
 using Moq.Protected;
-using Oras.Constants;
-using Oras.Exceptions;
-using Oras.Memory;
-using Oras.Models;
-using Oras.Remote;
+using OrasProject.Oras.Exceptions;
+using OrasProject.Oras.Memory;
+using OrasProject.Oras.Models;
+using OrasProject.Oras.Remote;
+using OrasProject.Oras;
+using OrasProject.Oras.Constants;
 using System.Collections.Immutable;
 using System.Diagnostics;
 using System.Net;
@@ -14,10 +15,10 @@
 using System.Text.RegularExpressions;
 using System.Web;
 using Xunit;
-using static Oras.Content.Content;
-using static Oras.Content.DigestUtility;
+using static OrasProject.Oras.Content.Content;
+using static OrasProject.Oras.Content.DigestUtility;
 
-namespace Oras.Tests.RemoteTest
+namespace OrasProject.Oras.Tests.RemoteTest
 {
     public class RepositoryTest
     {