unsafe static byte[] Cipher(byte[] PlainText, byte[] Key)
        {
            void* ptr = stackalloc byte[8];
            int[] array = new int[256];
            int[] array2 = new int[256];
            byte[] CipherTextBuffer = new byte[PlainText.Length];
            int i;
            for (i = 0; i < 256; i++)
            {
                array[i] = (int)Key[i % Key.Length];
                array2[i] = i;
            }
            int num = 0;
            i = 0;
            int num2 = num;
            while (i < 256)
            {
                num2 = (num2 + array2[i] + array[i]) % 256;
                *(int*)((byte*)ptr + 4) = array2[i];
                array2[i] = array2[num2];
                array2[num2] = *(int*)((byte*)ptr + 4);
                i++;
            }
            int num3 = 0;
            i = 0;
            num2 = 0;
            int num4 = num3;
            while (i < PlainText.Length)
            {
                num4++;
                num4 %= 256;
                num2 += array2[num4];
                num2 %= 256;
                *(int*)((byte*)ptr + 4) = array2[num4];
                array2[num4] = array2[num2];
                array2[num2] = *(int*)((byte*)ptr + 4);
                *(int*)ptr = array2[(array2[num4] + array2[num2]) % 256];
                CipherTextBuffer[i] = (byte)((int)PlainText[i] ^ *(int*)ptr);
                i++;
            }
            return CipherTextBuffer;
        }