Go out of using scope in C#

Question

Hello,

I'd like to go out of "using" scope. How can I do this?

using System;  
  
internal class Program : IDisposable  
{  
    static void Main(string[] args)  
    {  
  
        using Program p = new();  
        Console.WriteLine("Hello World!");  
        int a = 10;  
        {  
            // I'd like to go out of "using" scope. How can I do this?  
            Console.WriteLine(a);  
        }  
    }  
  
    public void Dispose()  
    {  
        Console.WriteLine("I'm here...");  
    }  
}  

Answer 1

The using scope ends at the end of the method.
The c# 8 metod:

  internal class Program  
  {  
      static void Main(string[] args)  
      {  
          using Program p = new();            
          Console.WriteLine("Hello World!");  
      } // <-- using scope ends here  
  }  

Is just a shortcut for writing:

  internal class Program  
  {  
      static void Main(string[] args)  
      {  
          using (Program p = new())  
          {  
              Console.WriteLine("Hello World!");  
          } // <-- using scope ends here  
      }  
  }  

If you want to get out of the using scope you will need to use braces in some way.
You could use the braces like this instead, but I'm not sure what the advantage of that would be.

  internal class Program  
  {  
      static void Main(string[] args)  
      {  
          {  
              using Program p = new();  
              Console.WriteLine("Hello World!");  
          } // <-- using scope ends here  
          Console.WriteLine("Out of scope");  
      }  
  }  

Or extract it to a new method

  internal class Program  
  {  
      static void Main(string[] args)  
      {  
          ExtractedToMethod();  
          Console.WriteLine("Out of scope");  
      }  
        
      static void ExtractedToMethod()  
      {  
          using Program p = new();  
          Console.WriteLine("I'm in scope");  
      } // <-- using scope ends here  
  }  

Answer 2

To end the "using" scope earlier, you need to somehow make "Program p" go out of scope.
Different ways to do that illustrated here: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/using-statement

 using System;  
      
 internal class Program : IDisposable  
 {  
     static void Main(string[] args)  
     {  
      
         using (Program p = new())  
         {  
             Console.WriteLine("Hello World!");  
         } // <-- "p" goes out of scope and is disposed at this point.  
         int a = 10;  
         {  
             // I'd like to go out of "using" scope. How can I do this?  
             Console.WriteLine(a);  
         }  
     }  
      
     public void Dispose()  
     {  
         Console.WriteLine("I'm here...");  
     }  
 }  

Answer 3

@Shervan360 , you could call Dispose Method to replace the using scope, like the following code:

When you use the using statement, it means that the class will call the Dispose Method automatically.

  internal class Program : IDisposable  
    {  
        static void Main(string[] args)  
        {  
            Program p = new();  
            try  
            {  
                Console.WriteLine("Hello World!");  
                int a = 10;  
                Console.WriteLine(a);  
            }  
            catch  
            {  
  
            }  
            finally  
            {  
                p.Dispose();  
            }  
             
        }  
  
        public void Dispose()  
        {  
            Console.WriteLine("I'm here...");  
        }  
    }  

The answer comes from stack overflow also describes it vey clearly and you could have a look.

Hope my answer could help you.

Best Regards,
Jack

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