Is there an easier way to do this in C#? (null-coalescing type question)

Is there an easier way to do this?

string s = i["property"] != null ? "none" : i["property"].ToString();

notice the difference between it and null-c开发者_JS百科oalesce (??) is that the not-null value (first operand of ?? op) is accessed before returning.

Try the following

string s = (i["property"] ?? "none").ToString();

If indexer returns object:

(i["property"] ?? (object)"none").ToString()

or just:

(i["property"] ?? "none").ToString()

If string:

i["property"] ?? "none"

Alternatives for fun.

void Main()
{
 string s1 = "foo";
 string s2 = null;
 Console.WriteLine(s1.Coalesce("none"));
 Console.WriteLine(s2.Coalesce("none"));
 var coalescer = new Coalescer<string>("none");
 Console.WriteLine(coalescer.Coalesce(s1));
 Console.WriteLine(coalescer.Coalesce(s2));
}
public class Coalescer<T>
{
    T _def;
    public Coalescer(T def) { _def = def; }
    public T Coalesce(T s) { return s == null ? _def : s; }
}
public static class CoalesceExtension
{
    public static string Coalesce(this string s, string def) { return s ?? def; }
}