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ä¾:StringBuilder s = new StringBuilder("abcdefg");s[0]='p';
Stringæ¹æ³å¯ä»¥ï¼å°±æ¯æçä¸é«
//[æ¹æ³ä¸]
string str = "abcdefg";
foreach (char var in str)
{
int index = str.IndexOf(var);
if (index == 0)
str = str.Replace(var, 'p');
break;
}
//[æ¹æ³äº]
//项ç®é
ç½®ä¸,å
许ä¸å®å
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unsafe
{
string str = "abcdefg";
fixed (char* p = str)
{
p[0]='p';
}
}
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