Some C# utility methods that came in handy recently

Utilities.cs

public static void Swap<T>(ref T a, ref T b) => (a,b)=(b,a);

public static void Sort<T>(ref T a, ref T b, ref T c, Comparison<T> comparison)
{
    if (comparison(a, b) > 0) Swap(ref a, ref b);
    if (comparison(a, c) > 0) Swap(ref a, ref c);
    if (comparison(b, c) > 0) Swap(ref b, ref c);
}

public static void Sort<T>(ref T a, ref T b, ref T c, ref T d, Comparison<T> comparison)
{
    if (comparison(a, b) > 0) Swap(ref a, ref b);
    if (comparison(c, d) > 0) Swap(ref c, ref d);
    if (comparison(a, c) > 0) Swap(ref a, ref c);
    if (comparison(b, d) > 0) Swap(ref b, ref d);
    if (comparison(b, c) > 0) Swap(ref b, ref c);
}

public static void Rotate<T>(ref T a, ref T b, ref T c, Func<bool> condition)
{
    while (!condition()) (a,b,c)=(b,c,a);
}

public static void Rotate<T>(ref T a, ref T b, ref T c, ref T d, Func<bool> condition)
{
    while (!condition()) (a,b,c,d)=(b,c,d,a);
}