OAuth Authentication with TLS 1.2 in WPF Window Application dotnet framework 4.0

Question

1. WPF Window Application dotnet framework 4.0
2. used OAuth authentication.
3. used Microsoft.Identity.Client Library to implement OAuth Authentication.

When we see logs on azure monitor all users sign in with Legacy TLS(TLS 1.0,1.1,3 DES).
We want to sign in with TLS 1.2
How can we Achive this?

We have successfully enabled TLS 1.2 for MVC web application user sign in with TLS 1.2

Answer 1

.net framework 4 is not supported and does not support tls 1.2. You should look at using .net framework 4.6.2 or later instead which supports tls1.2 by default.

if you are using .net framework 4.5 add this line of code

                  ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;