Difference between string and stringbuilder in c#

 

The main Difference between string and stringbuilder in c# is below

Sr No.	Sting	StringBuilder
1.	String is immutable.	StringBuilder is mutable in C#.
2.	We can't modify it after it is created. It creates a new object of string type in memory if we perform any operation in that String variable	This means that if an operation is performed on the string, it will not create a new instance every time. With that, it will not create new space in memory, unlike Strings.
3.	It is slow because all time create new instance	It is fast because of same instance using when any operation is performed
4.	The namespace used System	The namespace used System.Text