Implement an Interface with Generic Methods

Question

I\'m drawing a blank on this one and can\'t seem to find any previous example that I wrote. I\'m trying to implement a generic interface with a class. When I implement the inter

Answer 1

I think you probably want to redefine your interface like this:

public interface IOurTemplate
    where T : class
    where U : class
{
    IEnumerable List();
    T Get(U id);
}

I think you want the methods to use (re-use) the generic parameters of the generic interface in which they're declared; and that you probably don't want to make them generic methods with their own (distinct from the interface's) generic parameters.

Given the interface as I redefined it, you can define a class like this:

class Foo : IOurTemplate
{
    public IEnumerable List() { ... etc... }
    public Bar Get(Baz id) { ... etc... }
}

Or define a generic class like this:

class Foo : IOurTemplate
    where T : class
    where U : class
{
    public IEnumerable List() { ... etc... }
    public T Get(U id) { ... etc... }
}