VS: Automatic "ArgumentNull' check ?

Question

It's often the case when I need to check a method's arguments for not being null, something like:

public static bool operator <= 
    (ApplicationVersion i_app1, ApplicationVersion i_app2)
{ 
    if (i_app1 == null) throw new ArgumentNullException("i_app1");
    if (i_app2 == null) throw new ArgumentNullException("i_app2");
    [...]
}

Is there a way to do this (semi)automatically, like Code snippets? Autocomplete? Resharper?

Answer 1

Resharper has this feature. If you have cursor over parameter name - say i_app1 and hit Alt-Enter - it offers the option to check for null.

Answer 2

I have an extension method for this which at least makes it slightly simpler:

i_app1.ThrowIfNull("i_app1");

The implementation is simple:

public static void ThrowIfNull<T>(this T argument, string name)
    where T : class
{
    if (argument == null)
    {
        throw new ArgumentNullException(name);
    }
}

I prefer this to using snippets or whatever, as it means the code itself is shorter. Typing is rarely an issue for me - whereas keeping the code as readable as possible is.

Hopefully Code Contracts in .NET 4.0 will make this neater still though.