C# replace all occurrences of a character with just a character

Question

Let's say I have this string, "%%%%%ABC", I would like to replace all the "%" with just one "%", so it should be "%ABC".

If its "%%%A%%B%%C%%", it should be "%A%B%C%"

How should I do this?

Solution 1

There is a solution with Regex.Replace method:

private static string TruncatePercents(string input)
{
    return Regex.Replace(input, @"%+", "%");
}

Solution 2

Use this if you want to replace one or more non-word characters with the single same non-word character.

string result = Regex.Replace(str, @"(\W)+", "$1");

Solution 3

This'll sort it:

    string ProcessText(string s)
    {
       return Regex.Replace(s, @"%+", "%");
    }

Edit Got beaten to the punch, so to make mine slightly different and to offer scope for varying delimeters:

    private void button1_Click(object sender, EventArgs e)
    {
        label1.Text = ProcessText(textBox1.Text, "%", "#");
    }

    string ProcessText(string s, string delim, string replaceWith)
    {
       return Regex.Replace(s, @""+ delim + "+", replaceWith);
    }