C#

internal static class Singleton<T> where T : class
{
        private static T _instance;

        static Singleton()
        {
            Type type = typeof(T);
            BindingFlags searchPattern = BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance;
            ConstructorInfo constructor = type.GetConstructor(searchPattern, null, Type.EmptyTypes, null);

            if (constructor == null)
            {
                string errorMsg = String.Format("The type {0} does not have a default constructor.", type.FullName);
                throw new ArgumentNullException(errorMsg);
            }

            _instance = (T)constructor.Invoke(new object[0]);
            // ApplicationProtector.expType - wouldn't that just defy the purpose of generics ?
        }
}

The only programmers that are better C# programmers, are those who look like this ->

Programm3r
My Blog: ^_^

Singleton<MyClass> singleton = new Singleton<MyClass>();
singleton.Instance.Foo();
singleton.Instance.Bar = 5