Question

Looking up LINQ and Or in google is proving somewhat difficult so here I am.

I want to so the following:

(from creditCard in AvailableCreditCards  where creditCard.BillToName.ToLowerInvariant().Contains(txtFilter.Text.ToLowerInvariant()) **or creditCard.CardNumber.().Contains(txtFilter.Text)** orderby creditCard.BillToName select creditCard) 

Answer 1

C# keywords supporting LINQ are still C#. Consider where as a conditional like if; you perform logical operations in the same way. In this case, a logical-OR, you use ||

(from creditCard in AvailableCreditCards   where creditCard.BillToName.ToLowerInvariant().Contains(              txtFilter.Text.ToLowerInvariant())    || creditCard.CardNumber.().Contains(txtFilter.Text)  orderby creditCard.BillToName  select creditCard)