Swap

Swaps the values of two variables of the same type.

• Pass both values by reference using the ref keyword, then use a temp variable to swap their values.

public static partial class _30s 
{
  public static void Swap<T>(ref T val1, ref T val2) 
  {
    var temp = val1;
    val1 = val2;
    val2 = temp;
  }
}

string a = "Ipsum";
string b = "Lorem";

_30s.Swap(ref a, ref b); // a = "Lorem", b = "Ipsum"