Question

Is there a way to remove every special character from a string like:

"\r\n               1802 S St Nw<br>\r\n                    Washington, DC 20009"

And to just write it like:

"1802 S St Nw, Washington, DC 20009"

Answer 1

To remove special characters:

public static string ClearSpecialChars(this string input)
{
    foreach (var ch in new[] { "\r", "\n", "<br>", etc })
    {
        input = input.Replace(ch, String.Empty);
    }
    return input;
}

To replace all double space with single space:

public static string ClearDoubleSpaces(this string input)
{
    while (input.Contains("  ")) // double
    {
        input = input.Replace("  ", " "); // with single
    }
    return input;
}

You also may split both methods into a single one:

public static string Clear(this string input)
{
    return input
        .ClearSpecialChars()
        .ClearDoubleSpaces()
        .Trim();
}