How to fix 'The underlying connection was closed: An unexpected error occurred on a send'
By FoxLearn 2/16/2024 3:38:43 PM 134
This post shows you how to fix "The underlying connection was closed: An unexpected error occurred on a send." when calling the web api using RestSharp in c# .net through https protocol.
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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