dotnet core linux 接入支付宝H5支付，提示：System.PlatformNotSupportedException","Message":"'CspParameters' requires Windows Cryptographic API (CAPI), which is not available on this platform.

用的官方提供的demo，实际上部署后却出现了上图的错误。和技术支持沟通无效后，走上了不归路。

在微软的github dotnet/core开源库提交了issue后，终于获得了解决。附上链接：https://github.com/dotnet/core/issues/3020

有道翻译一下：

附上官方demo代码，被注视掉的部分就是引起问题的原因：　　　　

 // ------- create RSACryptoServiceProvider instance and initialize with public key -----
                //CspParameters CspParameters = new CspParameters();
                //CspParameters.Flags = CspProviderFlags.UseMachineKeyStore;

                //int bitLen = 1024;
                //if ("RSA2".Equals(signType))
                //{
                //    bitLen = 2048;
                //}

                RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
                RSAParameters RSAparams = new RSAParameters();
                RSAparams.Modulus = MODULUS;
                RSAparams.Exponent = E;
                RSAparams.D = D;
                RSAparams.P = P;
                RSAparams.Q = Q;
                RSAparams.DP = DP;
                RSAparams.DQ = DQ;
                RSAparams.InverseQ = IQ;
                RSA.ImportParameters(RSAparams);