How do I get the last four characters from a string in C#?

Question

Suppose I have a string:

\"34234234d124\"

I want to get the last four characters of this string which is \"d124\". I can use <

Answer 1

It is just this:

int count = 4;
string sub = mystring.Substring(mystring.Length - count, count);

Answer 2

Using Substring is actually quite short and readable:

 var result = mystring.Substring(mystring.Length - Math.Min(4, mystring.Length));
 // result == "d124"

Answer 3

Update 2020: C# 8.0 finally makes this easy:

> "C# 8.0 finally makes this easy"[^4..]
"easy"

You can also slice arrays in the same way, see Indices and ranges.

Answer 4

You can simply use Substring method of C#. For ex.

string str = "1110000";
string lastFourDigits = str.Substring((str.Length - 4), 4);

It will return result 0000.

Answer 5

string mystring = "34234234d124";
mystring = mystring.Substring(mystring.Length-4)

Answer 6

Compared to some previous answers, the main difference is that this piece of code takes into consideration when the input string is:

1. Null
2. Longer than or matching the requested length
3. Shorter than the requested length.

Here it is:

public static class StringExtensions
{
    public static string Right(this string str, int length)
    {
        return str.Substring(str.Length - length, length);
    }

    public static string MyLast(this string str, int length)
    {
        if (str == null)
            return null;
        else if (str.Length >= length)
            return str.Substring(str.Length - length, length);
        else
            return str;
    }
}