sqlhelper;

using sqlhelper = Microsoft.ApplicationBlocks.Data.SqlHelper;

using sqlhelper = Microsoft.ApplicationBlocks.Data.SqlHelper;

using sqlhelper = Microsoft.ApplicationBlocks.Data.SqlHelper;

using sqlhelper = Microsoft.ApplicationBlocks.Data.SqlHelper;

using sqlhelper = Microsoft.ApplicationBlocks.Data.SqlHelper;

using sqlhelper = Microsoft.ApplicationBlocks.Data.SqlHelper;

1 using sqlhelper = Microsoft.ApplicationBlocks.Data.SqlHelper;

sqlhelper;

原文：http://www.cnblogs.com/kejie/p/7235624.html