String

String is a data type that can hold texts. String is reference type variable. But when you pass a string to a variable or a method, it does not reference variable. Because string is immutable reference type. That means you cannot change string after it is created. Every change to a string will create a new string.

Let’s look at the following example,

using System;

namespace ZeroToCSharp {
    class Program {
        static void Main(string[] args) {

            string text1 = "C#";
            string text2 = text1;
            text2 = "React";

            //To print output
            Console.WriteLine(string.Concat("Text1: ", text1));
            Console.WriteLine(string.Concat("Text2: ", text2));
            Console.ReadKey();
        }
    }
}

Output:

Text1: C#
Text2: React

Although string is reference type, changing copied variable has not affected main variable. Because string is immutable, so any change to a string will create a new string as i said before.