Implement `IEnumerable` interface.

framework/src/Volo.Abp.Http.Client/Volo/Abp/Http/Client/ClientProxying/ClientProxyRequestTypeValue.cs

@@ -1,9 +1,10 @@
 using System;
+using System.Collections;
 using System.Collections.Generic;
 
 namespace Volo.Abp.Http.Client.ClientProxying
 {
-    public class ClientProxyRequestTypeValue
+    public class ClientProxyRequestTypeValue : IEnumerable<KeyValuePair<Type, object>>
     {
         public List<KeyValuePair<Type, object>> Values { get; private set; }
 
@@ -16,5 +17,15 @@ namespace Volo.Abp.Http.Client.ClientProxying
         {
             Values.Add(new KeyValuePair<Type, object>(type, value));
         }
+
+        public IEnumerator<KeyValuePair<Type, object>> GetEnumerator()
+        {
+            return Values.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return GetEnumerator();
+        }
     }
 }