Can I add an implicit conversion for two classes which I don't directly control?

Question

I\'d like to be able to implicitly convert between two classes which are otherwise incompatible.

One of the classes is Microsoft.Xna.Framework.Vector3,

Answer 1

No, you can't. The implicit operator has to be defined as a member of one of the classes. However, you can define an extension method (your example didn't work as extension methods have to be in a public static class).

public static class ConverterExtensions
{
    public static Vector ToVector (this Vector3 input)
    {
      //convert
    }
}