.net - Indexing into a String in C# as an L-Value -

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i have following intentionally trivial function:

void replacesome(ref string text) {     stringbuilder sb = new stringbuilder(text);     sb[5] = 'a';     text = sb.tostring(); }

it appears inefficient convert stringbuilder index , replace of characters copy ref'd param. possible index directly text param l-value?

or how else can improve this?

c# strings "immutable," means can't modified. if have string, , want similar different string, must create new string. using stringbuilder above easy method any.


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