public void NullParameterTest()
{
Insert();
var comm = new DbCommandUtil("SELECT * FROM TEST WHERE ID = @ID");
Assert.Equal(ConnectionState.Closed, comm.DaScopeContext.Connection.State);
comm.AddParameter("@ID", DbType.Int32, null);
Assert.Equal(0, comm.GetDataTable().Rows.Count);
comm.SetParameterValue("@ID", 0);
Assert.Equal(0, comm.GetDataTable().Rows.Count);
}