C # Search Table

[Dan Effets]

I am working on a project and hit a road block , I would like for the customer to be able to search the whole data table. So far I can only find a way to search one column.Also is there a way to use wildcards **?

private void btnFind_Click(object sender, EventArgs e)
        {
            tblEmployeeBindingSource.DataSource =
            from tblEmployee in hollandDataSet.tblEmployee
            where tblEmployee.LastName.StartsWith(txtFind.Text)
            orderby tblEmployee.EmployeeID, tblEmployee.FirstName, tblEmployee.LastName, tblEmployee.Position, tblEmployee.SupervisorID
            select tblEmployee;
            txtFind.Clear();
 
 
 
        }

Thank you
in advance