3 advantages of @ symbol in C#

Here we will see three different advantages of @ symbol in C# application.

In front of C# keyword

We can use @ symbol in front of any keyword in C# and we can suppress general meaning of that keyword. For example, in below program we have used @ symbol in front of if and while, very known keyword of C# but using @ symbol we can use them as normal variable. To control if and while loop we have used if and while keyword simultaneously.

using System;
using System.Collections;
using System.Globalization;

namespace Test1
{
    class Program
    {
        static void Main(string[] args)
        {
            int @if; // use if as an identifier and suppress it's general meaning
            int @While = 0;

            for (@if = 0; @if < 10; @if++)
Console.WriteLine("Value is " + @if);

            while (@While < 10)
            {
Console.WriteLine("Value is " + @While);
@While++;
            }
            Console.ReadLine();
        }
    }
}

To preserve white space

We can preserve white space using @ symbol before long string. In below example we have declared a long string with lot of white space and newline character. As we have used @ symbol the string preserve its state as it is.

using System;
using System.Collections;
using System.Globalization;

namespace Test1
{
    class Program
    {
        static void Main(string[] args)
        {
            String Name = @"Thsi
                            is 
                            my 
                            name
                            ";
            Console.WriteLine(Name);
            Console.ReadLine();
        }
    }
}

To insert special character within string

If we want to insert any special character within string then we have to use @ symbol in front of string. In below example we have declare a string which contents few special character like ‘and \ symbol. This is very useful to prevent SQL injection attack in application.

using System;
using System.Collections;
using System.Globalization;

namespace Test1
{
    class Program
    {
        static void Main(string[] args)
        {
            String str = @"Thsi ' is \n complex string";
            Console.WriteLine(str);
            Console.ReadLine();
        }
    }
}