Использование TLS12 .NET 3.5
Imports System.Security.Authentication
Imports System.Net
Combative Cicada
Imports System.Security.Authentication
Imports System.Net
public const SslProtocols _Tls12 = (SslProtocols)0x00000C00;
public const SecurityProtocolType Tls12 = (SecurityProtocolType)_Tls12;
ServicePointManager.SecurityProtocol = Tls12