Diff b/w String and String Builder in C#.Net

Strings:

• Strings are internally represented as character array
• System namespace contains a class string 
• System.String class is used to work with string litter ls   
• String litterls are nothing but a Sequence of Characters these are enclosed with double quotes 
• when we want to use string methods every time we have to create string object in the memory
• so it will degrade the performance of application 
• strings are immutable means,value cant be changed

Ex:
String s="Santhosh"

String Builder:

• String Builder is mutable means,value can be changed
• when we want to modify a string using string builder no need to create object 
• it will improves the performance of application