Easiest way to Rotate a List in c#

Question

Lists say I have a list List {1,2,3,4,5}

Rotate means:

=> {2,3,4,5,1} => {3,4,5,1,2} => {4,5,1,2,3}

Answer 1

I was asked to reverse a character array with minimal memory usage.

char[] charArray = new char[]{'C','o','w','b','o','y'};

Method:

static void Reverse(ref char[] s)
{
    for (int i=0; i < (s.Length-i); i++)
    {
        char leftMost = s[i];
        char rightMost = s[s.Length - i - 1];

        s[i] = rightMost;
        s[s.Length - i - 1] = leftMost;
    }
}