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Asked: 2026-05-11T15:45:23+00:00

In the following example, I want to define a System.Action which executes a specific

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In the following example, I want to define a System.Action which executes a specific method that I define at runtime, but how do I pass the method name (or the method itself) so that the Action method can define the delegate to point to that particular method?

I’m currently getting the following error:

‘methodName’ is a ‘variable’ but is used like a ‘method’

using System; using System.Collections.Generic;  namespace TestDelegate {     class Program     {         private delegate void WriteHandler(string message);          static void Main(string[] args)         {             List<string> words = new List<string>() { 'one', 'two', 'three', 'four', 'five' };             Action<string> theFunction = WriteMessage('WriteBasic');              foreach (string word in words)             {                 theFunction(word);             }             Console.ReadLine();         }          public static void WriteBasic(string message)         {             Console.WriteLine(message);         }          public static void WriteAdvanced(string message)         {             Console.WriteLine('*** {0} ***', message);         }          public static Action<string> WriteMessage(string methodName)         {             //gets error: 'methodName' is a 'variable' but is used like a 'method'             WriteHandler writeIt = new WriteHandler(methodName);              return new Action<string>(writeIt);         }      } }
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1 Answer

  1. You don’t need the Delegate declaration or the WriteMessage method. Try the following:

    using System; using System.Collections.Generic;  namespace TestDelegate {     class Program     {         static void Main(string[] args)         {             List<string> words = new List<string>() { 'one', 'two', 'three', 'four', 'five' };             Action<string> theFunction = WriteBasic;              foreach (string word in words)             {                 theFunction(word);             }             Console.ReadLine();         }          public static void WriteBasic(string message)         {             Console.WriteLine(message);         }          public static void WriteAdvanced(string message)         {             Console.WriteLine('*** {0} ***', message);         }      } }

    Action is already a delegate so you don’t need to make another one.

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