Common characters in two strings

Here I'm going to show how to compare two strings to find out how many characters are common in two strings. I create a method which take two strings as inputs and return the number of characters in the second String that are contained in the first string, in a one-to-one relationship.

	static void Main(string[] args)
	{
	Console.WriteLine("Welcome the common character Finder!\nWrite your 1st word here :");
	string firstWord = Console.ReadLine();
	Console.WriteLine("2nd word :");
	string secondtWord = Console.ReadLine();
	try
	{
	int numberOfCharacters = compare(firstWord, secondtWord);
	Console.WriteLine("Number of common characters: "+numberOfCharacters);
	}
	catch (Exception ex)
	{
	Console.WriteLine(ex.Message);
	}
	Console.Read();
	}
	public static int compare(String input1, String input2)
	{
	int[] c = new int[256];
	for (int i = 0; i < 256; i++)
	{
	c[i] = 0;
	}
	for (int i = 0; i < input1.Length; i++)
	{
	c[input1[i]]++;
	}
	int total = 0;
	for (int i = 0; i < input2.Length; i++)
	{
	if (c[input2[i]] > 0)
	{
	total++;
	c[input2[i]]--;
	}
	}
	return total;
	}

view raw compare.cs hosted with ❤ by GitHub

That is all
Enjoy..!!