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

Unfortunately no, you can't do this. Tls12 was not added until .netfx 4.5 (see the documentation). Note this also requires Windows Server 2008 R2+ or Windows 7+ to run correctly (notice the Applies To section on Introducing TLS).