Is it possible to create an extension method to format a string?

Question

the question is really simple. How do we format strings in C#? this way:

 string.Format(\"string goes here with placeholders like {0} {1}\", firstName, lastN         


        

Answer 1

Yes it is possible:

public static class Extensions
{
    public static string Format(this string str, params object[] args)
    {
        return String.Format(str, args);
    }
}

and should using as below:

Console.WriteLine("format string {0} {1}".Format((object)"foo", "bar"));

Answer 2

Yes as everybody above has said. But the newly preferred way should be:

$"string goes here {firstName} {lastName}";

Answer 3

sure...

public static class StringExtensions
{
    public static string FormatThis(this string format, params object[] args)
    {
        return string.Format(format, args);
    }
}