csharp-ggultip.cs

public struct CustomVector2
{
    public int X;
    public int Y;

    public CustomVector2(int x, int y)
    {
        X = x;
        Y = y;
    }

    public static implicit operator CustomVector2((int, int) valueTuple)
    {
        return new CustomVector2(valueTuple.Item1, valueTuple.Item2);
    }
}

public void Foo(CustomVector2 v)
{
    // Do something.
}

public void Bar(params CustomVector2[] v)
{
    // Do something.
}

public void Main()
{
    Foo((0, 0));
    Bar((0, 0), (0, 1), (1, 1), (2, 2));
}