A generic method for swapping two variables, the type of which implements IEquatable<>, if both variables are not equal. License: MIT

GenericSwap.cs

/// <summary>
/// Swaps two variables of type T with one another.
/// </summary>
/// <typeparam name="T">The type of both variables. Must implement IEquatable.</typeparam>
/// <param name="a">The first variable.</param>
/// <param name="b">The second variable.</param>
static void Swap<T>(ref T a, ref T b) where T : IEquatable<T>
{
  if (a.Equals(b)) return;
  T tempA = a;
  a = b;
  b = tempA;
}