How to create a sequence of integers in C#?

Enumerable.Range(0, 11);

Generates a sequence of integral numbers within a specified range.

http://msdn.microsoft.com/en-us/library/system.linq.enumerable.range.aspx

You can use Enumerable.Range(0, 10);. Example:

var seq = Enumerable.Range(0, 10);

MSDN page here.