xamarin android 获取根证书代码

Java.Security.KeyStore keyStore = Java.Security.KeyStore.GetInstance("AndroidCAStore");
            keyStore.Load(null, null);
            Java.Util.IEnumeration keyAliases = keyStore.Aliases();
            while (keyAliases.HasMoreElements)
            {
                string alias = (string)keyAliases.NextElement();
                //系统默认CA开头为system  用户的为user
                if (alias.StartsWith("system"))
                {
                    Java.Security.Cert.X509Certificate cert2 = (Java.Security.Cert.X509Certificate)keyStore.GetCertificate(alias);
                    if (keyID == cert2.SerialNumber.ToString())
                    {
                        isTrustRoot = true;
                    }
                }
            }

　　1、获取android根证书方法C#、xamarin.droid下获取。

 string keyID = cert.SerialNumber.ToString();
 System.Security.Cryptography.X509Certificates.X509Store store = new System.Security.Cryptography.X509Certificates.X509Store(System.Security.Cryptography.X509Certificates.StoreName.Root);

             store.Open(System.Security.Cryptography.X509Certificates.OpenFlags.ReadOnly);

             System.Security.Cryptography.X509Certificates.X509Certificate2Collection x509CertCollections = store.Certificates;

             var certs = store.Certificates.Find(System.Security.Cryptography.X509Certificates.X509FindType.FindBySerialNumber, keyID, true);
             if (certs.Count == )
             {
                 return false;
             }

2、在windows平台获取根证书方法。

3、IOS待补充。。。