What does static mean

Ramco Ramco

public static class CommonFunction
{
   public static bool IsAlphaNumericWithUnderscore(string input)
   {
     return Regex.IsMatch(input, "^[a-zA-Z0-9_]+$");
   }
   public static bool IsAllLetters(string s)
   {
     foreach (char c in s)
     {
       if (!Char.IsLetter(c))
         return false;
       }
       return true;
   }
}

Thanks

1 Reply

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Gowtham Cp2y ago
Accepted answer
In C#, static means that a class or its members belong to the class itself rather than to any individual instance. For example, with the CommonFunction class, you don’t create an object to use its methods. Instead, you call methods like IsAlphaNumericWithUnderscore and IsAllLetters directly on the class itself. This makes static members useful for utility functions that are shared across all uses of the class.

Here, you can use CommonFunction.IsAlphaNumericWithUnderscore("Test_123") or CommonFunction.IsAllLetters("HelloWorld") directly without creating an instance of CommonFunction.