Dictionary.GetVaueOrDefault.cs

static class DictionaryExtensions
{
	public static T GetValueOrDefault<T>(this IDictionary<string, object> source, string name)
	{
		if (source == null) throw new ArgumentNullException("source");
		if (name == null) throw new ArgumentNullException("name");
		
		var value = default(object);
		
		return (source.TryGetValue(name, out value) && (value is T))
			? (T)value
			: default(T);
	}
}

/*
void Main()
{
	var dictionary = new Dictionary<string, object>
	{
		{ "a", 1 },
		{ "b", "b" },
	};
	
	var a = dictionary.GetValueOrDefault<int>("a");
	Console.WriteLine(a);

	var b = dictionary.GetValueOrDefault<string>("b");
	Console.WriteLine(b);
}
*/