Let's Discuss difference between String and string in c#

Let's Discuss difference between

                    String  and  string in c#

in one word :-

                          String is a class in dotnet class library

                          

                          string is a keyword

illustration ::

                    Here we go,consider the following program

?

1 2 3 4 5 6 7 8 9 10

//program1 //program for just declaring a string variable using System; class Program { static void Main(string[] args)   {   String str = "string vs String";   } }

above program will run without any error but doesn't have any output.

Now  i remove the namespace System from the program,the code will looks like

?

1 2 3 4 5 6 7 8 9

//program2 //program for just declaring a string variable class Program { static void Main(string[] args)   {   String str = "string vs String";   } }

if i try to run the program it will shows following error message

from the above two program we understood that

• String is class inside System Namespace
• Since You must import System to use String

Now if i replace String with string in program2 as below

?

1 2 3 4 5 6 7 8 9

//program3 //program for just declaring a string variable class Program { static void Main(string[] args) { string str = "string vs String"; } }

program will run perfectly,So we may Conclude that

string keyword = System.String class

As always keywords always make the things more Simple.That means you can use variables of type string without using System namespace.