Get all elements but the first from an array
Solution 1:
Yes, Enumerable.Skip does what you want:
contents.Skip(1)
However, the result is an IEnumerable<T>, if you want to get an array use:
contents.Skip(1).ToArray()
Solution 2:
The following would be equivalent to your for loop:
foreach (var item in contents.Skip(1))
Message += item;