Common extension methods

IntegerExtensions.cs

public static class IntegerExtensions
{
    ///<summary>Returns an enumerable range of integers</summary>
    ///<example><c>5.To(9)</c></example>
    ///<example><c>5.To(-3)</c></example>
    public static IEnumerable<int> To(this int start,int end)
    {
        var sign = Math.Sign(end - start);
        while(start != end)
        {
             yield return start;
             start += sign;
        }
    }
}