Dictionaries to Map in MessagePack for .NET

gistfile1.cs

            if (type.IsMap())
            {
                Label work = il.DefineLabel();
                Label getNext = il.DefineLabel();
                Label end = il.DefineLabel();
                

                il.EmitLd(arg_writer);
                // 1. Get length of the dictionary
                il.EmitLd(arg_obj);
                il.Emit(OpCodes.Callvirt, typeof(System.Collections.ICollection).GetMethod("get_Count"));
                // 2. Write dictionary header
                il.Emit(OpCodes.Callvirt, typeof(MsgPackWriter).GetMethod("WriteMapHeader", new Type[] { typeof(int) }));
                // 3. Loop each member.
                // 3.1. Get The enumerator
                il.EmitLd(arg_obj);
                il.Emit(OpCodes.Callvirt, typeof(System.Collections.IDictionary).GetMethod("GetEnumerator"));
                il.EmitSt(local_enumerator);
                var foreachblocklabel = il.BeginExceptionBlock();
                il.Emit(OpCodes.Br_S, getNext);
                il.MarkLabel(work);
                // 3.x Extract the element
                il.EmitLd(local_enumerator);
                il.Emit(OpCodes.Callvirt, typeof(IDictionaryEnumerator).GetProperty("Key").GetGetMethod());
                il.EmitSt(local_keyvalue);
                EmitPackMemberValueCode(type.GetGenericArguments()[0], il, arg_writer, local_keyvalue, null, null, type, mi, lookupPackMethod);
                il.EmitLd(local_enumerator);
                il.Emit(OpCodes.Callvirt, typeof(IDictionaryEnumerator).GetProperty("Value").GetGetMethod());
                il.EmitSt(local_keyvalue);
                EmitPackMemberValueCode(type.GetGenericArguments()[1], il, arg_writer, local_keyvalue, null, null, type, mi, lookupPackMethod);

                // 3.x GetNext
                il.MarkLabel(getNext);
                il.EmitLd(local_enumerator);
                il.Emit(OpCodes.Callvirt, typeof(IEnumerator).GetMethod("MoveNext"));
                il.Emit(OpCodes.Brtrue_S, work);
                // 3.x Finish the loop
                il.Emit(OpCodes.Leave, end);
                il.BeginFinallyBlock();
                il.EmitLd(local_enumerator);
                il.Emit(OpCodes.Callvirt, typeof(IDisposable).GetMethod("Dispose"));
                il.EndExceptionBlock();
                il.MarkLabel(end);

                goto FinallyProcess;
            }