Dim s As String
s = "how"
s += " many"
s += " strings"
s += " are"
s += "allocated?"
Console.WriteLine(s)
C# Code Snippet
string s;
s = "how";
s += " many";
s += " strings";
s += " are";
s += "allocated?";
Console.WriteLine(s);
If you said one string was allocated, then... you are wrong. Five strings are actually allocated. Strings in the .NET framework are immutable. This means that each change the string s causes the runtime to create a new string and abandon the old one. The immutable nature of .NET strings should be considered when performance is a concern. The creation of temporary strings can be avoided using two methods:
- Use the String classes Concat, Join or Format methods to join multiple in a single statement
- Use the StingBuilder class to create dynamic (mutable) strings
Additional Resources
String class (Microsoft)
StringBuilder class (Microsoft)
