加入DllImport函数声明即可：[DllImport("my.dll", EntryPoint = "piccwriteex")]public static extern Byte piccwriteex(Byte ctrlword,StringBuilder serial,Byte area,Byte keyA1B0,StringBuilder picckey,StringBuilder piccdata0_2);或[DllImport("my.dll", EntryPoint = "piccwriteex")]public static extern Byte piccwriteex(Byte ctrlword,[MarshalAs(UnmanagedType.LPArray)] Byte[] serial,Byte area,Byte keyA1B0,[MarshalAs(UnmanagedType.LPArray)] Byte[] picckey,[MarshalAs(UnmanagedType.LPArray)] Byte[] piccdata0_2);
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