（无效的 RSA 私钥格式）我似乎在密码学中遇到了某种错误

问：

当它读取私钥并将其编码为 Base64 时出现一个问题，当它包含非 base64 字符时，即“----BEGIN”和----END“行，我删除了这些字符，它似乎已经修复了该错误，但现在我在标题中出现错误，即”无效的 RSA 私钥格式”

（这可能不需要，但我的私钥以“MIIC”开头并有换行符）

我是密码学和 C# 的新手，我不断收到一个奇怪的错误，有人知道这个问题的解决方案吗？谢谢。

下面是一段失败的代码：

namespace Backend1618.Controllers
{
    public class SignatureFramework : ControllerBase
    {
        private static RSACryptoServiceProvider? _rsaCsp;
        private static SHA1? _shaCsp;

        public static void Setup()
        {
            try
            {
                string privateKeyPem = System.IO.File.ReadAllText("PrivateKey.pem");
                byte[] privateKeyBytes = Convert.FromBase64String(privateKeyPem);
                RSAParameters rsaParams = DecodeRSAPrivateKey(privateKeyBytes);

                _shaCsp = SHA1.Create();
                _rsaCsp = new RSACryptoServiceProvider();
                _rsaCsp.ImportParameters(rsaParams);

                Console.WriteLine("[SignatureFramework] Successfully initialized SignatureFramework!");
            }
            catch (Exception ex)
            {
                throw new Exception("Error setting up SignatureFramework: " + ex.Message);
            }
        }

        private static RSAParameters DecodeRSAPrivateKey(byte[] privateKeyBytes)
        {
            using (MemoryStream stream = new MemoryStream(privateKeyBytes))
            using (var reader = new BinaryReader(stream))
            {
                ushort version = reader.ReadUInt16();

                if (version != 0x300)
                    throw new ArgumentException("Invalid RSA private key format.");

                ushort modulusLength = reader.ReadUInt16();
                byte[] modulusBytes = reader.ReadBytes(modulusLength);

                ushort exponentLength = reader.ReadUInt16();
                byte[] exponentBytes = reader.ReadBytes(exponentLength);
                string privateKeyPem = System.IO.File.ReadAllText("PrivateKey.pem");

                while (reader.PeekChar() != -1)
                {
                    int v = reader.ReadInt32();
                    privateKeyPem = v.ToString();
                }

                ushort dLength = reader.ReadUInt16();
                byte[] dBytes = reader.ReadBytes(dLength);
                ushort pLength = reader.ReadUInt16();
                byte[] pBytes = reader.ReadBytes(pLength);
                ushort qLength = reader.ReadUInt16();
                byte[] qBytes = reader.ReadBytes(qLength);
                ushort dpLength = reader.ReadUInt16();
                byte[] dpBytes = reader.ReadBytes(dpLength);
                ushort dqLength = reader.ReadUInt16();
                byte[] dqBytes = reader.ReadBytes(dqLength);
                ushort inverseQLength = reader.ReadUInt16();
                byte[] inverseQBytes = reader.ReadBytes(inverseQLength);
                RSAParameters rsaParams = new RSAParameters
                {
                    Modulus = modulusBytes,
                    Exponent = exponentBytes,
                    D = dBytes,
                    P = pBytes,
                    Q = qBytes,
                    DP = dpBytes,
                    DQ = dqBytes,
                    InverseQ = inverseQBytes
                };
                return rsaParams;
            }
        }

更改获取私钥的方法，它仍然报告相同的错误。