Sample for https://github.com/FakeItEasy/FakeItEasy/issues/677

OutAndRefDelegate.cs

public delegate bool TrySomething(string key, out string result);

[Test]
public void Should_be_able_to_assign_out_and_ref()
{
    var fake = A.Fake<TrySomething>();

    string sample = null;
    string expectedOut = "hello";
    string result = null;
    A.CallTo(() => fake.Invoke("key", out sample)).WithAnyArguments().Returns(true).AssignsOutAndRefParameters(expectedOut);

    fake.Invoke("key", out result);

    Assert.That(result, Is.SameAs(expectedOut));
}