Integrate P6 EPPM with REST API using .NET, C#

In P6 EPPM REST API, We are able to access “Login” and “Logout” APIs through C# & .Net, but we are not able to access the other APIs Like “Read Project”, “Read Activity”, “Update Activity”, etc.

During the First time, “Read Project” is working fine but on subsequent requests, it is sending a 500-Internal server error.

Request you to help us out on why it is showing us error on subsequent requests.

This is our code:-

Login:

List<CookieList> cookielst = new List<CookieList>();

CookieContainer cookies = new CookieContainer();

HttpClientHandler handler = new HttpClientHandler();

handler.CookieContainer = cookies;

Uri uri = new Uri("https://au1.p6.oraclecloud.com/");