Update README. Add examples.

README.md

@@ -1,25 +1,59 @@
 # acryptohashnet
 A pure c# implementation of well-known cryptographic hash functions for .Net Framework, .Net Core, Mono and other .Net Standard 2.1 compatible platforms.
 
-Originally project was developed between 2006-2009 as an open source project and was hosted on SourceForge: https://sourceforge.net/projects/acryptohashnet/.
-
 # Features
   * Pure managed implementations,
   * Implements System.Security.Cryptography.HashAlgorithm,
   * Fast and low memory footprints (less GC)
 
-# Sample
+# Usage samples
+
+## MD5 of file
+``` csharp
+using System;
+using System.IO;
+using System.Linq;
+
+static class Program
+{
+  static void Main(string[] args)
+  {
+    var hashAlgorithm = new acryptohashnet.MD5();
+
+    using(var stream = File.OpenRead(@"C:\Windows\System32\explorer.exe"))
+    {
+      var hashBytes = hashAlgorithm.ComputeHash(stream);
+      Console.WriteLine("Hash: {0}", hashBytes.ToHexString());
+    }
+  }
+
+   static string ToHexString(this byte[] input) => string.Join("", input.Select(x => x.ToString("x2")));
+}
+```
+
+## SHA512 of string
 
 ``` csharp
-var hashAlgorithm = new acryptohashnet.SHA512();
-var hashBytes = hashAlgorithm.ComputeHash(
-  File.ReadAllBytes("file.txt")
-);
-Console.WriteLine("Hash: {0}", string.Join("", hashBytes.Select(x => x.ToString("x2"))))
+using System;
+using System.Linq;
+using System.Text;
+
+static class Program
+{
+  static void Main(string[] args)
+  {
+    var hashAlgorithm = new acryptohashnet.SHA512();
+    var hashBytes = hashAlgorithm.ComputeHash("message digest".ToUtf8Bytes());
+    Console.WriteLine("Hash: {0}", hashBytes.ToHexString());
+  }
+
+   static byte[] ToUtf8Bytes(this string input) => Encoding.UTF8.GetBytes(input);
+   static string ToHexString(this byte[] input) => string.Join("", input.Select(x => x.ToString("x2")));
+}
 ```
 
 # MD Family
-All functions designed and specified by  [Ron Rivest](https://en.wikipedia.org/wiki/Ron_Rivest).
+All functions designed and specified by [Ron Rivest](https://en.wikipedia.org/wiki/Ron_Rivest).
   * MD2, specification: [RFC 1319](docs/rfc1319.txt).
   * MD4, specification: [RFC 1320](docs/rfc1320.txt).
   * MD5, specification: [RFC 1321](docs/rfc1320.txt).
@@ -55,3 +89,6 @@ Designed and specified by [Ralph C. Merkle](https://en.wikipedia.org/wiki/Ralph_
 
 Designed and specified by [Ross Anderson](https://en.wikipedia.org/wiki/Ross_J._Anderson) and [Eli Biham](https://en.wikipedia.org/wiki/Eli_Biham).
 
+# See also
+Originally project was developed between 2006-2009 as an open source project and was hosted on SourceForge: https://sourceforge.net/projects/acryptohashnet/.
+