Advantage of using System.Text.StringBuilder over System.String

Question

Hi , Ques What is the advantage of using System.Text.StringBuilder over System.String ?

Senthilkumar · Answer

Hi Karthik, String is immutable and StringBuilder is mutable. Once created a string cannot be changed. A StringBuilder can be changed as many times as necessary. It yields astonishing performance improvements. It eliminates millions of string copies. Many C# programs append or replace strings in loops. There the StringBuilder type becomes a necessary optimization. Advantages: It is efficient when we do large number of string concatination. It will not create the new instance in the memory for every string addition. It will append on the same place. It will increase the performance. The string is immutable where it creates the new instances for every string operations like addition. It is huge memory occupation in the processor. It has the addition functionality of append the line , insert in the string builder.

Sam Hobbs · Answer

Note that Senthilkumar is quoting from C# StringBuilder Secrets .

Sam Hobbs · Answer

What have you heard? Certainly you have read something. There are very many articles that say that a String is immutable and a StringBiluder is mutable. Those are fancy words that I have not seen used very much but they are used very frequently when describig strings and StringBuilder objects. You can search like this . Some of the results are: StringBuilder and String Concatenation StringBuilder Class in C# String and StringBuilder Classes StringBuilder Class in C# Many of those articles explain that the StringBuilder class can improve performace. Also look at StringBuilder Class (System.Text) . It explains another good advantage of the StringBuilder class.