Server Error in '/' Application.

The request was aborted: Could not create SSL/TLS secure channel.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Net.WebException: The request was aborted: Could not create SSL/TLS secure channel.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[WebException: The request was aborted: Could not create SSL/TLS secure channel.]
   System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request) +380
   System.Net.WebClient.DownloadString(Uri address) +117
   EfasisCMS.yardimci.DovizKurlariniAl() in C:\source\repos\EfasisCMS\EfasisCMS\siniflar\yardimci.cs:1787
   EfasisCMS.Global.Session_Start(Object sender, EventArgs e) in C:\source\repos\EfasisCMS\EfasisCMS\Global.asax.cs:30
   System.Web.SessionState.SessionStateModule.CompleteAcquireState() +375
   System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) +1257
   System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +703
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +158


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4110.0