Characters, Escape sequences, Strings, Concatenations and Conversions in C#

char c = 'c';

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Man
{
    class Program
    {
        static void Main()
        {
            char s = 'S';                 // Simple Character
            char nextLine = '\n';         // Escape Sequence for going to the next line 
            char back = '\r';             // Escape Sequence for carriage return

            Console.WriteLine(nextLine);  // Prints nothing but skips to the next line.
            Console.WriteLine(s);         // Prints the character 'S'
            Console.WriteLine(back);                       
        }  
    }
}

• string is an immutable object which represents a series of Unicode characters. 
• It can be used in many methods without its data change. 
• It is a valid which reduces copies. 
• It makes the programs more robust.
• .Net Framework type is 'System.String'.

string s = "Hello !!";

• 'Immutable' means they cannot be changed after they have been created.
• But if we go with the below example, we can say that, the above meaning is not exactly true in real programming,
  

  string s = "Hello";
  s = "Bye";
  
  Console.WriteLine(s);

  In the above code we are changing the value of the string which gives the following output,
  
  
• Hence, the 'immutability' means where the String reference is pointing to. In the above example, initially s is pointing to the string "Hello" and later it has been changed (pointed) to "Bye". 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Man
{
    class Program
    {
        static void Main()
        {
            string s1 = "Hello";
            string s2 = "Hello";
            Console.WriteLine(s1 == s2);       // Prints True as it follows the Valu-type approach

            string s3 = "Escape Sequence:\n";
            Console.WriteLine(s3);             // Prints Escape Sequence and goes to the next line    
        }  
    }
}

string s = "Abhi" + "ram"   // result becomes Abhiram

String s = "a" + 6  // a6

String Comparisions:

Conclusion