Why is resharper making the following recommendation?

Question

My code is...

public static void AssertNotNull<T>(string name, T val) {
    if (val == null)
        throw new ArgumentNullException(String.Format("{0} must not be null", name));
}

Resharper is recommending...

public static void AssertNotNull<T>(string name, T val) {
    if (Equals(val, default(T)))
        throw new ArgumentNullException(String.Format("{0} must not be null", name));
}

Answer 1

Because it doesn't know if T is a value type or reference type, so it makes the code work with both.