C# 如何判断NMEA或TAIP语句是否有效

这个问题（为了自私地提升我的微观声誉，我打算自己回答）是一个c代码，用来判断NMEA或TAIP格式的给定句子是否有效。。。基本上计算校验和应该是什么，并将其与给定的校验和进行比较，然后返回真或假…

这是我提出的代码…Carson63000提供的答案有一定的可信度

类程序
{
静态void Main（字符串[]参数）
{
Console.WriteLine（isnNameMessageValid（$GPRMC，102957.92，A，4104.8569，N，00836.4700，W，0.000，5.822230211,0，W，A*2B））.ToString（）；
Console.WriteLine（isnMemessageValid（$GPRMC，102957.92，A，4104.8569，N，00836.4700，W，0.000，5.822230211，0，W，A*1B））；//应为false，将校验和从2B更改为1B
Console.WriteLine（IsTAIPMessageValid（“>RPV68168+4008572-0828021400026912；ID=M123；*dRPV68168+4008572-0828021400026912；ID=M123；*cRPV54366+4001403-0828656300005512；ID=GH75；*7cRPV54366+4001403-0828656300005512；ID=GH75；*7请看一看是的，我的答案中有一部分归功于Carson63000的答案，但他只涵盖了NMEA消息……我的答案（我可以在7小时内发布）也将涵盖TAP消息…对使用两种消息格式的用户很有帮助…固定问题：句子不是GPS的一部分。“句子”是通信协议（如NMEA或TAP）的一部分，用于和一些（但决不是全部）GPS接收器通信（例如，支持NMEA或TAIP的接收人）。
class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine(IsNMEAMessageValid("$GPRMC,102957.92,A,4104.8569,N,00836.4700,W,0.000,5.822,230211,0,W,A*2B").ToString());
        Console.WriteLine(IsNMEAMessageValid("$GPRMC,102957.92,A,4104.8569,N,00836.4700,W,0.000,5.822,230211,0,W,A*1B").ToString());   // should be false, changed the checksum from 2B to 1B

        Console.WriteLine(IsTAIPMessageValid(">RPV68168+4008572-0828021400026912;ID=M123;*d<").ToString());
        Console.WriteLine(IsTAIPMessageValid(">RPV68168+4008572-0828021400026912;ID=M123;*c<").ToString());    // should be false, changed the checksum from d to c

        Console.WriteLine(IsTAIPMessageValid(">RPV54366+4001403-0828656300005512;ID=GH75;*7c<").ToString());
        Console.WriteLine(IsTAIPMessageValid(">RPV54366+4001403-0828656300005512;ID=GH75;*7b<").ToString());    // should be false, changed the checksum from 7c to 7b

        Console.ReadLine();
    }

    private static bool IsNMEAMessageValid(string sentence)
    {
        // Checksum for NMEA includes XOR on all characters between (not including) the $ and the *, including the commas...
        int checksum = Convert.ToByte(sentence[sentence.IndexOf('$') + 1]);
        for (int i = sentence.IndexOf('$') + 2; i < sentence.IndexOf('*'); i++)
        {
            checksum ^= Convert.ToByte(sentence[i]);
        }
        int givenChecksum = Convert.ToInt16(sentence.Split('*')[1], 16);
        return checksum == givenChecksum;
    }

    private static bool IsTAIPMessageValid(string sentence)
    {
        // Checksum for TAIP includes XOR on all characters starting with > and up to and including *
        int checksum = Convert.ToByte(sentence[sentence.IndexOf('>')]);
        for (int i = sentence.IndexOf('>') + 1; i < sentence.IndexOf('*') + 1; i++)
        {
            checksum ^= Convert.ToByte(sentence[i]);
        }
        char[] splitChars = { '*', '<' };
        int givenChecksum = Convert.ToInt16(sentence.Split(splitChars)[1], 16);
        return checksum == givenChecksum;
    }
}