C#

delegate TReturn ReturnFunction<TReturn, TArg>(TArg argument);

ReturnFunction<DateTime, SomeObject> method = delegate(SomeObject o)
   {
      int year = Convert.ToInt32(((string)o.Value).Substring(0, 4));
      int month = Convert.ToInt32(((string)o.Value).Substring(4, 2));
      int day = Convert.ToInt32(((string)o.Value).Substring(6, 2));
      return new DateTime(year, month, day);
   };

DateTime dt = method(someObjectInstance);

delegate TReturn ReturnFunction<TReturn, TArg>(TArg argument);

Function<string, string> myFunc = SomeFuncThatTakesTwoStrings;

...

void SomeFuncThatTakesTwoStrings(string first, string second) { ... }

DateTime dt = delegate(string dateString){
   int year = dateString.SubString(0, 4);
   int month = dateString.SubString(4, 2);
   int day = dateString.SubString(6, 2);
   return new DateTime(year, month, day);
};

DateTime Date
{
  get
  {
    try
    {
      AcquireLock(); // lock(this)
      return date;
    }
    finally
    {
      ReleaseLock(); // end of lock(this)
    }
  }
  set
  {
    try
    {
      AcquireLock(); // lock(this)
      date = value;
    }
    finally
    {
      ReleaseLock(); // end of lock(this)
    }
  }
}