public void AddTwoTables()
{
var ds = new DataSet();
ds.Tables.Add();
Assert.Equal("Table1", ds.Tables[0].TableName);
//Assert.Equal(ds.Tables[0].TableName,"Table1");
ds.Tables.Add();
Assert.Equal("Table2", ds.Tables[1].TableName);
//Assert.Equal(ds.Tables[1].TableName,"Table2");
}