string banana = "banana apple";
banana.Replace("apple", "pie");
如果我想用派来替换苹果,我需要这样做吗?还是需要使用以下方法?
if(banana.Contains("apple"))
banana.Replace("apple", "pie");
string banana = "banana apple";
banana.Replace("apple", "pie");
if(banana.Contains("apple"))
banana.Replace("apple", "pie");