diff --git a/Src/Asp.NetCore2/SqlSugar/Infrastructure/DependencyManagement.cs b/Src/Asp.NetCore2/SqlSugar/Infrastructure/DependencyManagement.cs
index e945e567a..2894c6afd 100644
--- a/Src/Asp.NetCore2/SqlSugar/Infrastructure/DependencyManagement.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Infrastructure/DependencyManagement.cs
@@ -125,7 +125,7 @@ namespace SqlSugar
                     var conn = db.GetAdapter();
                     IsTryKd = true;
                 }
-                catch (Exception ex)
+                catch  
                 {
                     var message = "需要引用Kdbndp.dll,Github搜索sqlsugar源码里面有";
                     throw new Exception(message);
@@ -143,7 +143,7 @@ namespace SqlSugar
                     var conn = db.GetAdapter();
                     IsTryDm = true;
                 }
-                catch (Exception ex)
+                catch  
                 {
                     var message = "需要引用DmProvider.dll,Github搜索sqlsugar源码里面有";
                     throw new Exception(message);
@@ -161,7 +161,7 @@ namespace SqlSugar
                     var conn = db.GetAdapter();
                     IsTryOscar = true;
                 }
-                catch (Exception ex)
+                catch  
                 {
                     var message = "需要引用Oscar.Data.SqlClient.dll,Github搜索sqlsugar源码里面有";
                     throw new Exception(message);
diff --git a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
index 8fcb20103..088fc1de5 100644
--- a/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Interface/IQueryable.cs
@@ -368,7 +368,7 @@ namespace SqlSugar
         ISugarQueryable<T, T2> GroupBy(Expression<Func<T, T2, object>> expression);
         new ISugarQueryable<T, T2> GroupByIF(bool isGroupBy, Expression<Func<T, object>> expression);
         ISugarQueryable<T, T2> GroupByIF(bool isGroupBy, Expression<Func<T,T2, object>> expression);
-        ISugarQueryable<T, T2> GroupByIF(bool isGroupBy, string groupFields);
+        new ISugarQueryable<T, T2> GroupByIF(bool isGroupBy, string groupFields);
         new ISugarQueryable<T, T2> Having(Expression<Func<T, bool>> expression);
         ISugarQueryable<T, T2> Having(Expression<Func<T, T2, bool>> expression);
         new ISugarQueryable<T, T2> Having(string whereString, object whereObj = null);