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  1. using System;
  2. using System.Globalization;
  3. using System.Linq;
  4. using System.Collections.Generic;
  5.  
  6.     public static class Extensions
  7.     {
  8.         public static bool ContainsSubstring(this string string1, string string2, int minLength, StringComparison comparison)
  9.         {
  10.             if (minLength <= 0) throw new ArgumentException("Minimum-length of substring must be greater than 0", "minLength");
  11.             if (string.IsNullOrEmpty(string1) || string1.Length < minLength) return false;
  12.             if (string.IsNullOrEmpty(string2) || string2.Length < minLength) return false;
  13.             for (int i = 0; i < string1.Length - minLength; i++)
  14.             {
  15.                 string part1 = string1.Substring(i, minLength);
  16.                 if (string2.IndexOf(part1, comparison) > -1)
  17.                     return true;
  18.             }
  19.             return false;
  20.         }
  21.     }
  22.  
  23. public class Test
  24. {
  25. 	public static void Main()
  26. 	{
  27.         string Text1 = "123bob456";
  28.         string Text2 =  "bobishere";
  29.         bool contains = Text1.ContainsSubstring(Text2, 3, StringComparison.CurrentCultureIgnoreCase);  // true
  30.         Console.WriteLine(contains);
  31. 	}
  32. }
Success #stdin #stdout 0.05s 33960KB
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True
https://ideone.com/lXRrVB
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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