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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.Threading.Tasks;
  6.  
  7. namespace Miscellaneous
  8. {
  9.     class Hello_World_
  10.     {
  11.         static void Main()
  12.         {
  13.             Console.WriteLine("Hello world!");
  14.             Console.Read();
  15.         }
  16.     }
  17. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
prog.cs(5,24): error CS0234: The type or namespace name `Tasks' does not exist in the namespace `System.Threading'. Are you missing an assembly reference?
Compilation failed: 1 error(s), 0 warnings
stdout
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Standard output is empty
https://ideone.com/JGYFGS
language:
C# (gmcs 5.20.1)
created:
13 years ago
visibility:
secret

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