How to count number of occurrences of a character in String C#

To count the number of occurrences of a character in a string, we can use the LINQ in C#.

Here is an example that counts the number of occurrences of a character exclamation ! in a given string.

using System;
using System.Linq;

class CountCharacters {
  static void Main() {
      string mystr = "Hello! world ! ok !";
      int count = mystr.Count(f => f == '!');      Console.WriteLine(count);
  }
}

Output:

3

Similarly, you can use the Split() method if you don’t like using LINQ.

using System;

class CountCharacters {
  static void Main() {
      string mystr = "Hello! world ! ok !";
      int count = mystr.Split('!').Length - 1;
      Console.WriteLine(count);
  }
}