Question

I’m starting with Lambda Expressions to understand how to define anonymous methods using it.

I have the following simple code:

delegate void AddNumber(int number);
class LambdaExpressionSample
{
   static void Main(string[] args)
   {
      AddNumber method = r => Console.WriteLine(r + r);Console.Read();
      method(1);
   }
}

What I would like is that the method would be equal to this:

AddNumber method = new AddNumber(delegate(int number) 
{ 
   Console.WriteLine(number+number); 
   Console.Read(); 
});

But the code with the lambda expression is not working properly because the lambda expression ends apparently with the semicolon “;” after the Console.WriteLine.

How could I make my method execute Console.WriteLine and Console.Read using my lambda example?

Answer 1

You have to use braces if you have more then one statement

AddNumber method = r => 
{
    Console.WriteLine(r + r);
    Console.Read();
};