diff --git a/Src/Asp.NetCore2/SqlSugar/OnlyCore/PartialExpressionContexts.cs b/Src/Asp.NetCore2/SqlSugar/OnlyCore/PartialExpressionContexts.cs
index a6bf9c3ea..58a76c2a6 100644
--- a/Src/Asp.NetCore2/SqlSugar/OnlyCore/PartialExpressionContexts.cs
+++ b/Src/Asp.NetCore2/SqlSugar/OnlyCore/PartialExpressionContexts.cs
@@ -13,6 +13,9 @@ namespace SqlSugar
     public partial class OracleExpressionContext
     {
     }
+    public partial class SqlServerBlukCopy
+    {
+    }
     public partial class MySqlBlukCopy<T> 
     {
         internal SqlSugarProvider Context { get; set; }
diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerBlukCopy.cs b/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerBlukCopy.cs
index 6125c248a..abf227c96 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerBlukCopy.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/SqlServer/SqlBuilder/SqlServerBlukCopy.cs
@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace SqlSugar 
 {
-    public class SqlServerBlukCopy
+    public partial class SqlServerBlukCopy
     {
         internal List<IGrouping<int, DbColumnInfo>> DbColumnInfoList { get;   set; }
         internal SqlSugarProvider Context { get;   set; }