public void Contains()
{
DataTableCollection tbcol = _dataset[0].Tables;
tbcol.Clear();
/* _tables is array of DataTables defined in Setup */
tbcol.AddRange(_tables);
string tblname = "";
/* checking for a recently input table, expecting true */
Assert.Equal(true, tbcol.Contains(_tables[0].TableName));
/* trying to check with a empty string, expecting false */
Assert.Equal(false, tbcol.Contains(tblname));
/* trying to check for a table that donot exist, expecting false */
Assert.Equal(false, tbcol.Contains("InvalidTableName"));
}