The request was aborted: Could not create SSL/TLS secure channel. (RestSharp, SSL Client Certificates) - authentication

Question

I have following code which is calling an API using basic authentication and SSL client certificate but its throwing exception and giving me following error.
"The request was aborted: Could not create SSL/TLS secure channel."
I tried to find a solution on Google but failed to find any solution. Can anyone help me out on this. Thanks.
// Variables
string basicAuthenticationUserName = "username";
string basicAuthenticationPassword = "password";
string clientCertificateFilePath = "Path-To-Certificate-File";
string clientCertificatePassword = "certificate-password";
string url = "https://" + basicAuthenticationUserName + ":" + basicAuthenticationPassword + "#apiserverurl/apimethod";
// Creating RestSharp Request Object
var request = new RestRequest(Method.POST)
{
RequestFormat = DataFormat.Json,
OnBeforeDeserialization = resp =>
{
resp.ContentType = "application/json";
}
};
// Adding Headers
request.AddHeader("Content-Length", "0");
request.AddHeader("Accept", "application/x-null-message");
// Importing Certificates
var certificates = new X509Certificate();
certificates.Import(clientCertificateFilePath, clientCertificatePassword, X509KeyStorageFlags.PersistKeySet);
// Creating RestSharp Client Object
var client = new RestClient
{
BaseUrl = new Uri(url),
ClientCertificates = new X509CertificateCollection { certificates },
Authenticator = new HttpBasicAuthenticator(managingLou, basicAuthenticationPassword)
};
// Executing Request
var response = client.Execute<T>(request);

Answer 1

I have faced the similar issue. Let me mention the steps here for your help.
After the installation of windows service, I went through the following steps to fix the issue:
Go To Start > Run and type Services.msc
Select your service > Right click and choose Properties
Select the 2nd tab "Log On"
Select the radio button "This account"
Enter the username and password of currently log in user. (Make sure Its the same user who has installed the service)
Apply the changes
Start the service