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  1. using System;
  2. using System.Linq;
  3.  
  4. public class Test
  5. {
  6.   public static void Main() {
  7.     string[] tests = { "a", 1.ToString(), "321", "xyz" };
  8.     foreach (var test in tests) {
  9.       Console.WriteLine(test.ToChar());
  10.     }
  11.   }
  12. }
  13.  
  14. public static class StringExtensions {
  15.   public static char ToChar(this string value) {
  16.     if (string.IsNullOrEmpty(value)) throw new ArgumentException();
  17.     return value.First();
  18.   }
  19. }
Success #stdin #stdout 0.02s 15784KB
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stdin
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Standard input is empty
stdout
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a
1
3
x
https://ideone.com/QpUns7
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
public

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