如何模拟/创建用于单元测试的X509Certificate2？

using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;

// 创建一个空的X509Certificate2对象
X509Certificate2 certificate = new X509Certificate2();

// 或者从现有的证书文件加载
string certificatePath = "path/to/certificate.pfx";
string certificatePassword = "password";
certificate = new X509Certificate2(certificatePath, certificatePassword);

// 设置证书的公钥
byte[] publicKeyBytes = GetPublicKeyBytes(); // 获取公钥字节数组
certificate.PublicKey = new PublicKey(publicKeyBytes);

// 设置证书的私钥
byte[] privateKeyBytes = GetPrivateKeyBytes(); // 获取私钥字节数组
certificate.PrivateKey = new PrivateKey(privateKeyBytes);

// 设置证书的有效期
DateTime validFrom = DateTime.Now;
DateTime validTo = DateTime.Now.AddYears(1);
certificate.NotBefore = validFrom;
certificate.NotAfter = validTo;

// 设置证书的颁发者和主题
certificate.Issuer = "Issuer";
certificate.Subject = "Subject";

// 设置证书的序列号
certificate.SerialNumber = "1234567890";

// 设置证书的算法
certificate.SignatureAlgorithm = "SHA256";

// 在单元测试中使用模拟/创建的X509Certificate2对象进行测试
// 可以调用相应的方法，传递证书对象作为参数进行测试