Mark parameters as NOT nullable in C#/.NET?

Question

Is there a simple attribute or data contract that I can assign to a function parameter that prevents null from being passed in C#/.NET? Ideally this would also

Answer 1

Ok this reply is a bit late, but here is how I am solving it:

public static string Default(this string x)
{
    return x ?? "";
}

Use this exension method then you can treat null and empty string as the same thing.

E.g.

if (model.Day.Default() == "")
{
    //.. Do something to handle no Day ..
}

Not ideal I know as you have to remember to call default everywhere but it is one solution.