How is Tuple<T1,T2>.Create<T1,T2>(T1 item1, T2 item2) implemented?

Question

I'm trying to implement a similar method as Tuple<T1,T2>.Create<T1,T2>(T1 item1, T2 item2), but I still have to specify the type parameters whereas Tuple.Create infers them.

I think the definition is right. What am I doing wrong? Here's my code:

public class KeyValuePair<K, V>
{
    public K Key { get; set; }       

    public V Value { get; set; }

    public static KeyValuePair<K, V> Create<K, V>(K key, V value)
    {
        return new KeyValuePair<K, V> { Key = key, Value = value };
    }
}

Answer 1

You'll want to create a non-generic version of the class.

public class KeyValuePair
{
    public static KeyValuePair<K, V> Create<K, V>(K key, V value)
    {
        return new KeyValuePair<K, V>(key, value);
    }
}

Answer 2

I figured it out. It's not defined as a static method on the Tuple<T1,T2> class, but on the Tuple class.