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by yeasku 268 days ago
Strings in C# are inmutable.

To work with strings you should use StringBuilder.
2 comments
orphea 268 days ago 

  > Strings in C# are inmutable.
Yes, but

  > To work with strings you should use StringBuilder.
It helps combine strings together. The author needed the opposite - split/slice strings.
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kbolino 268 days ago
Eric Lippert describes the difference between immutability and what he calls "persistence" and explains why C#/.NET copies the string contents to make a substring: https://stackoverflow.com/a/6750591/814422

Go's strings are also immutable and yet substrings share the same internal memory. Java/JVM also has immutable strings and yet substrings shared the char[] array of the parent string up until Java 7, when they switched to copying instead (for the same reason as .NET): https://mail.openjdk.org/pipermail/core-libs-dev/2012-June/0...

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yeasku 266 days ago
That SO link is really good, thank you for the comment.
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