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); }