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입력 한 내용입니다. 오류없이 빌드됩니다. "데이터 원본 = SQL1NullReferenceException이 처리되지 않았습니다.
MyConnectionString = ConfigurationManager.ConnectionStrings["Data Source=sql1;Initial Catalog=DW_screening;Persist Security Info=True;User ID=xxxxx;Password=xxxxxx;Write"];
MySqlConnection = new SqlConnection(MyConnectionString.ConnectionString);
MySqlConnection.Open();
MessageBox.Show("Connection Opened Successfully");
//MySqlConnection.Close();