Is there an easy way to change a char in a string in C#?

Question

I want to do this:

string s = "abc";
s[1] = 'x';

and s will become "axc". However, it seems that string[i] only has a getter and has no setter. The compiler gives me the following error:

"Property or indexer 'string.this[int]' cannot be assigned to -- it is read only"

I guess I could make a loop and change the char i want. but i was just wondering if there is an easy way to do it? And why there isn't a setter for string[i]?

Thanks in advance.

Answer 1

Strings are immutable, so you have to make a char[] array, change it, then make it back into a string:

string s = "foo";
char[] arr = s.ToCharArray();
arr[1] = 'x';
s = new string(arr);

Answer 2

Strings are immutable which is why there's no setter, you can however use a string builder:

StringBuilder s = new StringBuilder("abc");

s[1] = 'x';