'Does using a Range to get part of a string create a new string in memory?

By using the C# 8 feature Range, does it create a new string in memory or does it provide a "pointer" to the memory parts of the previous string already there?

c++sharpstringrange


Solution 1:[1]

var x = "foo"[1..2];

Is compiled to;

int num = 1;
int length = 2 - num;
"foo".Substring(num, length);

And .Substring will create a new copy of the characters.

If you don't need a string, you could use "foo".AsSpan()[1..2];

Solution 2:[2]

I'm not following your question. A range of a string is not a string, its an array of char. string implements IEnumerable<char>.

If you want a substring, then you should use string.Substring, and yes, it will create a new string.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Jeremy Lakeman
Solution 2 marc_s

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