I am trying to write lambda expression for Action, but it is not compiling.

Question

The program states that I am not using the same variables as used in definition.

Program.cs

using System;

namespace Treehouse.CodeChallenges
{
    public class Program
    {     
        public Func<int, int> Square = (int number) => (number * number);

        public Action<int, Func<int, int>> DisplayResult = (int result, Func<int, int> function) => Console.WriteLine(function(result));

        static void Main(string[] args)
        {

        }
    }
}

Answer 1 · 2016-06-23T21:24:51Z

June 23, 2016 9:24pm

You don't need the argument types in the lambda expression, they are inferred by the compiler:

        public Action<int, Func<int, int>> DisplayResult = (result, function) => Console.WriteLine(function(result));

Answer 2 · 2016-06-23T21:58:13Z

June 23, 2016 9:58pm

The code you posted compiles fine for me -- double check you saved Program.cs before you compile it...

But FYI you won't be able to use the Square Func or the DisplayResult Action in the Main method because Square and DisplayResult are instance members while Main is a static method -- static methods can't access instance members.

You would need to make Square and DisplayResult static if you want to access them inside Main.

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Jabran Noor

Jabran Noor

I am trying to write lambda expression for Action, but it is not compiling.

2 Answers

Steven Parker

Steven Parker

Ryan Sheppard

Ryan Sheppard