public bool TryAdd(
	TKey1 key1,
	TKey2 key2
)

Public Function TryAdd ( 
	key1 As TKey1,
	key2 As TKey2
) As Boolean

public:
bool TryAdd(
	TKey1 key1, 
	TKey2 key2
)

member TryAdd : 
        key1 : 'TKey1 * 
        key2 : 'TKey2 -> bool