diff --git a/Src/Asp.NetCore2/SqlSugar/Entities/ConnectionConfig.cs b/Src/Asp.NetCore2/SqlSugar/Entities/ConnectionConfig.cs
index 044e165cc..fdbad7915 100644
--- a/Src/Asp.NetCore2/SqlSugar/Entities/ConnectionConfig.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Entities/ConnectionConfig.cs
@@ -70,14 +70,14 @@ namespace SqlSugar
     public class SqlMiddle
     {
         public bool? IsSqlMiddle { get; set; }
-        public Func<string, SugarParameter[], object> GetScalar { get; set; } = (s,p) => throw new NotSupportedException("SqlMiddle.GetScalar");
-        public Func<string, SugarParameter[],int> ExecuteCommand { get; set; } = (s, p) => throw new NotSupportedException("SqlMiddle.ExecuteCommand");
-        public Func<string, SugarParameter[],IDataReader> GetDataReader { get; set; } = (s, p) => throw new NotSupportedException("SqlMiddle.GetDataReader");
-        public Func<string, SugarParameter[],DataSet> GetDataSetAll { get; set; } = (s, p) => throw new NotSupportedException("SqlMiddle.GetDataSetAll");
-        public Func<string, SugarParameter[], Task<object>> GetScalarAsync { get; set; } = (s, p) => throw new NotSupportedException("SqlMiddle.GetScalarAsync");
-        public Func<string, SugarParameter[], Task<int>> ExecuteCommandAsync { get; set; } = (s, p) => throw new NotSupportedException("SqlMiddle.ExecuteCommandAsync");
-        public Func<string, SugarParameter[], Task<IDataReader>> GetDataReaderAsync { get; set; } = (s, p) => throw new NotSupportedException("SqlMiddle.GetDataReaderAsync");
-        public Func<string, SugarParameter[], Task<DataSet>> GetDataSetAllAsync { get; set; } = (s, p) => throw new NotSupportedException("SqlMiddle.GetDataSetAllAsync");
+        public Func<string, SugarParameter[], object> GetScalar { get; set; } = (s,p) => throw new Exception("SqlMiddle.GetScalar is null");
+        public Func<string, SugarParameter[],int> ExecuteCommand { get; set; } = (s, p) => throw new Exception("SqlMiddle.ExecuteCommand is null");
+        public Func<string, SugarParameter[],IDataReader> GetDataReader { get; set; } = (s, p) => throw new Exception("SqlMiddle.GetDataReader is null");
+        public Func<string, SugarParameter[],DataSet> GetDataSetAll { get; set; } = (s, p) => throw new Exception("SqlMiddle.GetDataSetAll is null");
+        public Func<string, SugarParameter[], Task<object>> GetScalarAsync { get; set; } = (s, p) => throw new Exception("SqlMiddle.GetScalarAsync is null");
+        public Func<string, SugarParameter[], Task<int>> ExecuteCommandAsync { get; set; } = (s, p) => throw new Exception("SqlMiddle.ExecuteCommandAsync is null");
+        public Func<string, SugarParameter[], Task<IDataReader>> GetDataReaderAsync { get; set; } = (s, p) => throw new Exception("SqlMiddle.GetDataReaderAsync is null");
+        public Func<string, SugarParameter[], Task<DataSet>> GetDataSetAllAsync { get; set; } = (s, p) => throw new Exception("SqlMiddle.GetDataSetAllAsync is null");
 
     }
     public class AopEvents