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What is the difference between String and StringBuilder in C#? |
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Answer» The major difference between String and StringBuilder is that String OBJECTS are immutable while StringBuilder creates a mutable string of characters. StringBuilder will make the changes to the existing object RATHER than creating a new object. StringBuilder SIMPLIFIES the entire process of making changes to the existing string object. Since the String class is immutable, it is costlier to create a new object every time we need to make a CHANGE. So, the StringBuilder class comes into picture which can be evoked using the System.Text namespace. In case, a string object will not change throughout the entire program, then use String class or else StringBuilder. For ex: string s = string.Empty; for (i = 0; i < 1000; i++) { s += i.ToString() + " "; }Here, you’ll need to create 2001 objects out of which 2000 will be of no use. The same can be APPLIED using StringBuilder: StringBuilder sb = new StringBuilder(); for (i = 0; i < 1000; i++) { sb.Append(i); sb.Append(' '); }
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