指针的问题

Question

代码如下：
[DllImport("LClientDll.dll",EntryPoint="LClientStartDemo",ExactSpelling=false,CallingConvention=CallingConvention.Cdecl)]
        public static extern int  LClientStartDemo(string *host, string  *port, string  *oper, string  *ch, int *flag);
        [DllImport("LClientDll.dll",EntryPoint="LClientRcvDemo",ExactSpelling=false,CallingConvention=CallingConvention.Cdecl)]
        public static extern int LClientRcvDemo(string  *data);
提示指针和固定缓冲只能在不安全的上下文中使用。求教各位高手该如何改写！！！！！！

Answer 1

string  *port
改为stringbuilder

Answer 2

具体如何改写？
还不够具体么？把string * 改为stringbuilder。还要怎么具体？

Answer 3

[DllImport("LClientDll.dll",EntryPoint="LClientStartDemo",ExactSpelling=false,CallingConvention=CallingConvention.Cdecl)]
        public static extern int LClientStartDemo(string host, string port, string oper, string ch, int flag);
        [DllImport("LClientDll.dll",EntryPoint="LClientRcvDemo",ExactSpelling=false,CallingConvention=CallingConvention.Cdecl)]
        public static extern int LClientRcvDemo(StringBuilder sb);
        [DllImport("LClientDll.dll",EntryPoint="LClientStop",ExactSpelling=false,CallingConvention=CallingConvention.Cdecl)]
        public static extern int  LClientStop();
改写成这样就可以了

Answer 4

如果加*提示不安全说明要加unsafe喽，比如public unsafe static，具体实现可按提示解决