Is that possible to send HttpWebRequest using TLS1.2 on .NET 4.0 framework

Question

My application connects to Experian server and Experian will soon stop supporting TLS 1.0 and TLS 1.1. All connectivity using HTTPS must use TLS Version 1.2.

I want

Answer 1

I had to deal with the same problem, while integrating PayPal into a legacy application, and found the following workaround for .NET 4.0 which seems to do the trick:

ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
ServicePointManager.DefaultConnectionLimit = 9999;

Basically the workaround is to directly assign the port for TLS 1.2.

All credit goes to the commenter at CodeProject.