When a Rubyist writes C#...

GlobalExtensions.cs

using System;

public static class GlobalExtensions {
	public static bool IsNull<T>(this T self) {
		return self == null;
	}
	
	public static bool IsPresent<T>(this T self) {
		return !self.IsNull();
	}
	
	public static void Try<T>(this T self, Action<T> action) {
		if(self.IsPresent()) {
			action(self);
		}
	}
	
	public static X Try<T,X>(this T self, Func<T,X> function) {
		return self.Try(function, default(X));
	}
	
	public static X Try<T,X>(this T self, Func<T,X> function, X defaultValue) {
		if(self.IsPresent()) {
			return function(self);
		}
		
		return defaultValue;
	}
}