fix format string

Author: zengin

Templates/CSharp/Base/CollectionRequest.Base.template.tt

@@ -195,7 +195,7 @@ public string GetPostAsyncMethodForReferencesRequest(OdcmProperty odcmProperty,
     stringBuilder.Append("            }");
     stringBuilder.Append(Environment.NewLine);
     stringBuilder.Append(Environment.NewLine);
-    stringBuilder.AppendFormat("            var requestBody = new {0} {{ ODataId = string.Format(\"{{1}}/{1}{2}/{{2}}\", this.Client.BaseUrl, {3}.Id) }};", referenceRequestBodyTypeName, serviceNavigationProperty.Name, implicitNavigationProperty, sanitizedPropertyName);
+    stringBuilder.AppendFormat("            var requestBody = new {0} {{ ODataId = string.Format(\"{{0}}/{1}{2}/{{1}}\", this.Client.BaseUrl, {3}.Id) }};", referenceRequestBodyTypeName, serviceNavigationProperty.Name, implicitNavigationProperty, sanitizedPropertyName);
     stringBuilder.Append(Environment.NewLine);
     stringBuilder.AppendFormat("            return this.SendAsync(requestBody, cancellationToken);");
     stringBuilder.Append(Environment.NewLine);

test/Typewriter.Test/TestDataCSharp/com/Microsoft/Graph2/CallRecords/Requests/SegmentRefTypesCollectionReferencesRequest.cs

@@ -59,7 +59,7 @@ public System.Threading.Tasks.Task AddAsync(Microsoft.Graph.EntityType3 entityTy
                 throw new Microsoft.Graph.ServiceException(new Microsoft.Graph.Error { Code = "invalidRequest", Message = "ID is required to add a reference." });
             }
 
-            var requestBody = new Microsoft.Graph.ReferenceRequestBody { ODataId = string.Format("{1}/testTypes/{2}", this.Client.BaseUrl, entityType3.Id) };
+            var requestBody = new Microsoft.Graph.ReferenceRequestBody { ODataId = string.Format("{0}/testTypes/{1}", this.Client.BaseUrl, entityType3.Id) };
             return this.SendAsync(requestBody, cancellationToken);
         }