fix the content type issue

Author: ArcturusZhang

packages/http-client-csharp/generator/Microsoft.Generator.CSharp.ClientModel/src/Primitives/ScmKnownParameters.cs

@@ -7,6 +7,7 @@
 using System.Threading;
 using System.Xml;
 using System.Xml.Linq;
+using Microsoft.Generator.CSharp.Input;
 using Microsoft.Generator.CSharp.Primitives;
 using Microsoft.Generator.CSharp.Providers;
 using static Microsoft.Generator.CSharp.Snippets.Snippet;
@@ -56,6 +57,6 @@ public static ParameterProvider ClientOptions(CSharpType clientOptionsType)
             DefaultValue = Static(typeof(DateTimeOffset)).Property(nameof(DateTimeOffset.Now))
         };
 
-        public static readonly ParameterProvider ContentType = new("contentType", $"The contentType to use which has the multipart/form-data boundary.", typeof(string));
+        public static readonly ParameterProvider ContentType = new("contentType", $"The contentType to use which has the multipart/form-data boundary.", typeof(string), wireInfo: new PropertyWireInformation(SerializationFormat.Default, true, false, false, false, "Content-Type"));
     }
 }

packages/http-client-csharp/generator/Microsoft.Generator.CSharp.ClientModel/src/Providers/ClientProvider.cs

@@ -254,7 +254,14 @@ private IReadOnlyList<FieldProvider> BuildAdditionalClientFields()
                             FieldModifiers.Private | FieldModifiers.ReadOnly,
                             type.WithNullable(!p.IsRequired),
                             "_" + p.Name.ToVariableName(),
-                            this);
+                            this,
+                            wireInfo: new PropertyWireInformation(
+                                ClientModelPlugin.Instance.TypeFactory.GetSerializationFormat(p.Type),
+                                p.IsRequired,
+                                false,
+                                p.Type is InputNullableType,
+                                false,
+                                p.NameInRequest));
                         if (p.IsApiVersion)
                         {
                             _apiVersionField = field;

packages/http-client-csharp/generator/Microsoft.Generator.CSharp.ClientModel/src/Providers/RestClientProvider.cs

@@ -99,7 +99,7 @@ private MethodProvider BuildCreateRequestMethod(InputOperation operation)
 
             foreach (var param in ClientProvider.ClientParameters)
             {
-                paramMap[param.Name] = param;
+                paramMap[param.WireInfo.SerializedName] = param;
             }
 
             var classifier = GetClassifier(operation);

packages/http-client-csharp/generator/Microsoft.Generator.CSharp/src/Providers/FieldProvider.cs

@@ -49,7 +49,8 @@ public FieldProvider(
             string name,
             TypeProvider enclosingType,
             FormattableString? description = null,
-            ValueExpression? initializationValue = null)
+            ValueExpression? initializationValue = null,
+            PropertyWireInformation? wireInfo = null)
         {
             Modifiers = modifiers;
             Type = type;
@@ -58,6 +59,7 @@ public FieldProvider(
             InitializationValue = initializationValue;
             XmlDocs = Description is not null ? new XmlDocProvider() { Summary = new XmlDocSummaryStatement([Description]) } : null;
             EnclosingType = enclosingType;
+            WireInfo = wireInfo;
 
             InitializeParameter();
         }
@@ -66,7 +68,7 @@ public FieldProvider(
         private void InitializeParameter()
         {
             _parameter = new(() => new ParameterProvider(
-                Name.ToVariableName(), Description ?? FormattableStringHelpers.Empty, Type, field: this));
+                Name.ToVariableName(), Description ?? FormattableStringHelpers.Empty, Type, field: this, wireInfo: WireInfo));
         }
 
         private MemberExpression? _asMember;