programming-examples/c-sharp/Strings/C# Sharp to find the number of times a substring appears in the given string.cs

using System;
public class exercise19
{
    public static void Main()
    {
        string str1;
        string findstring;
        int strt = 0;
        int cnt = -1;
        int idx = -1;
        Console.Write("\n\nFind the number of times a specific string appears in a string :\n");
        Console.Write("--------------------------------------------------------------------\n");
        Console.Write("Input the original string : ");
        str1 = Console.ReadLine();
        Console.Write("Input the string to be searched for : ");
        findstring = Console.ReadLine();
        while (strt != -1)
            {
                strt = str1.IndexOf(findstring, idx + 1);
                cnt += 1;
                idx = strt;
            }
        Console.Write("The string '{0}' occurs " + cnt + " times.\n", findstring);
    }
}