Update db.InsertableByObject

Src/Asp.Net/SqlSugar/Abstract/DynamicBuilder/CommonMethodInfo.cs

@@ -8,8 +8,20 @@ namespace SqlSugar
 {
     public class CommonMethodInfo
     {
-        internal object Context { get; set; } 
+        internal object Context { get; set; }
 
+        public int ExecuteReturnIdentity()
+        {
+            if (Context == null) return 0;
+            var result = Context.GetType().GetMyMethod("ExecuteReturnIdentity", 0).Invoke(Context, new object[] { });
+            return (int)result;
+        }
+        public async Task<int> ExecuteReturnIdentityAsync()
+        {
+            if (Context == null) return 0;
+            var result = Context.GetType().GetMyMethod("ExecuteReturnIdentityAsync", 0).Invoke(Context, new object[] { });
+            return await (Task<int>)result;
+        }
         public int ExecuteCommand()
         {
             if (Context == null) return 0;