Trim last character from a string

Question

I have a string say

\"Hello! world!\" 

I want to do a trim or a remove to take out the ! off world but not off Hello.

Answer 1

Slightly modified version of @Damian Leszczyński - Vash that will make sure that only a specific character will be removed.

public static class StringExtensions
{
    public static string TrimLastCharacter(this string str, char character)
    {
        if (string.IsNullOrEmpty(str) || str[str.Length - 1] != character)
        {
            return str;
        }
        return str.Substring(0, str.Length - 1);
    }
}