Question

I want to be able to check whether a value is the default for its value type. Ideally, I’d like to say:

DoSomething<TValue>(TValue value) {
    if (value == default(TValue)) {
        ...
    }
}

However, the compiler complains that it can’t do a == comparison on TValue and TValue. This is the best workaround that I’ve come up with so far:

DoSomething<TValue>(TValue value) {
    if (value == null || value.Equals(default(TValue))) {
        ...
    }
}

Is there a more elegant/correct way to go about this?

Answer 1

public bool EqualsDefaultValue<T>(T value)
{
    return EqualityComparer<T>.Default.Equals(value, default(T));
}