Simple:

//Where yourBytes is an initialized byte array. int[] bytesAsInts = yourBytes.Select(x => (int)x).ToArray(); 

Simple:

//Where yourBytes is an initialized byte array. int[] bytesAsInts = yourBytes.Select(x => (int)x).ToArray(); 

Make sure you include System.Linq with a using declaration:

using System.Linq; 

And if LINQ isn't your thing, you can use this instead:

int[] bytesAsInts = Array.ConvertAll(yourBytes, c => (int)c);