How to fix 'The underlying connection was closed: An unexpected error occurred on a send'
By FoxLearn 8/1/2024 2:46:25 AM 801
The error "The underlying connection was closed: An unexpected error occurred on a send." typically occurs when there's a problem with the SSL/TLS communication between your application and the server.
This issue can be related to several factors, such as SSL/TLS protocol mismatches, server configuration issues, or network problems.
To solve the problem you should set the configuration as the following c# code.
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12;
You can add the code above in the Program class.
static class Program { /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12; Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new frmFluentDesignForm()); } }
I hope so you can solve the problem when using RestSharp library with https protocol.
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