Insert support pure Dictionary

Src/Asp.Net/SqlServerTest/Demos/3_Insert.cs

@@ -59,6 +59,11 @@ namespace OrmTest.Demo
 
             var t12 = db.Insertable(insertObj).IgnoreColumns(it => it == "Name" || it == "TestId").ExecuteReturnIdentityAsync();
             t12.Wait();
+
+
+            var dt = new Dictionary<string, object>();
+            dt.Add("name", "1");
+            var t66 = db.Insertable(dt).AS("student").ExecuteReturnEntity();
         }
     }
 }