Create Local Method Using _this In Struct - CSharp Custom Type

CSharp examples for Custom Type:Local Method

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Description

Create Local Method Using _this In Struct

Demo Code

using System;/*w  w  w. jav a  2 s.co m*/
public struct SimpleValue
{
   public int Value { get; }
   public SimpleValue(int value) => this.Value = value;
   public void PrintAndReplace(int newValue)
   {
      PrintAndReplaceImpl(ref this);
      void PrintAndReplaceImpl(ref SimpleValue _this)
      {
         // Using this instead of _this causes a compile-time error
         Console.WriteLine($"Old value: {_this.Value}");
         _this = new SimpleValue(newValue);
      }
   }
}
public class LocalMethodUsingThisInStruct
{
   static void Main()
   {
      var simpleValue = new SimpleValue(10);
      Console.WriteLine(simpleValue.Value); // 10
      simpleValue.PrintAndReplace(20);      // Prints "Old value: 10"
      Console.WriteLine(simpleValue.Value); // 20
   }
}

Result


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