Difference between string and stringbuilder?
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Answer Posted / vinodh kumar
Though string looks like mutable(the value can be changed once after initial value) but string is not mutable. Every time you modify the string a new object reference will be created and it will gets updated. StringBuilder is mutable.
In situations like you want to concat strings in loopings, we'll use StringBuilder.
In loops like for, for each, while, etc., using string for concatenation it will give negative performance.
Conclusion:
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String is Immutable.
StringBuilder is Mutable. For performance reasons during concatenation operations in string in conditional looping statements we use StringBuilder.
http://msdn.microsoft.com/en-us/library/system.text.stringbuilder.aspx
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