If you don´t use LINQ on a regular basis you sometimes need some examples which show you the direction.

Microsoft published a good library of the most common LINQ usages under http://msdn.microsoft.com/de-de/vcsharp/aa336746(en-us).aspx

The VB guys will find LINQ examples for VB.NET under http://msdn.microsoft.com/en-us/vbasic/bb688088.aspx

Happy coding!