If you are not able to add a property to system.net class library.
Then, add in Global.asax file:
ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072; //TLS 1.2
ServicePointManager.SecurityProtocol = (SecurityProtocolType)768; //TLS 1.1
And you can use it in a function, at the starting line:
ServicePointManager.SecurityProtocol = (SecurityProtocolType)768 | (SecurityProtocolType)3072;
And, it’s being useful for STRIPE payment gateway, which only supports TLS 1.1, TLS 1.2.
EDIT:
After so many questions on .NET 4.5 is installed on my server or not… here is the screenshot of Registry on my production server:
I have only .NET framework 4.0 installed.
