.net - string 是不可变的，而 stringbuilder 是可变的

Question

谁能举例说明

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相关讨论: Most efficient way to concatenate strings?

Answer 1

string s = "a";

s += "b"; // this will create a new string object

StringBuilder sb = new StringBuild();
sb.Append("a");
sb.Append("b"); // appends to existing StringBuilder