Loading a nunit test dll gives 'no test cases'

[janwilmans]

This dialog is displayed if the [TestFixture] attribute is missing

[TestFixture]
public class Test
{
    [Test]
    public void TestMethod() 
    {
    }
}

I think it would be nice to suggest to check the [TestFixture] and [Test] attributes on the class and methods. Maybe add a code-example for nunit in the Help-menu also.