Home > DeveloperSection > Interviews > What’s the difference between System.Text.StringBuilder and System.String?

Posted on    October-15-2010 12:00 AM

 C# C# 
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Uttam Misra

Total Post:54

Posted on    October-29-2010 12:00 AM

StringBuilderis more efficient in the cases, where a lot of manipulation is done to thetext. Strings are immutable, so each time it’s being operated on, a newinstance is created.

Amit Singh

Total Post:565

Posted on    April-16-2011 12:00 AM

Difference between StringBuilder and string
String and StringBuilder class stores strings. But when you cannot change a String object after creating one.
eg: String name = "amit";
By saying you cannot change the name object means you cannot change the value in name object internally. When you
change the name object value to something else, a new String object is creating in memory and assign the new
Example: name = "Amit Singh";

If you are doing string concatenation StringBuilder class is far better in performance than String class.
You can use StringBuilder's Append() method to use concatenation.

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