Convert a Try... function in C# to a Get... function.

Demo.cs

// Try it out: http://ideone.com/Aubx5H

using System;

namespace Knapcode.KitchenSink.Extensions
{
	public static class UniversalExtensions
	{
	    public delegate bool TryGetValue<in TInput, TOutput>(TInput input, out TOutput value);
		
		public static TOutput GetTryValue<TInput, TOutput>(this TInput input, TryGetValue<TInput, TOutput> tryGetValue)
		{
			TOutput value;
			if (!tryGetValue(input, out value))
			{
				value = default(TOutput);
			}
	 
			return value;
		}
	}
	
	public class Program
	{
		public static void Main()
		{
		    const string number = "42";
		    Console.WriteLine(number.GetTryValue<string, int>(int.TryParse) + 23);
		}
	}
}

GetTryValue.cs

namespace Knapcode.KitchenSink.Extensions
{
    public static class UniversalExtensions
    {
        public delegate bool TryGetValue<in TInput, TOutput>(TInput input, out TOutput value);

        public static TOutput GetTryValue<TInput, TOutput>(this TInput input, TryGetValue<TInput, TOutput> tryGetValue)
        {
            TOutput value;
            if (!tryGetValue(input, out value))
            {
                value = default(TOutput);
            }

            return value;
        }
    }
}