Blazor App - Write and Read Cookies

Hi, I am writing my first server sided Blazor App using core 3.0.  I have a simple request, but I cannot work out how to do it.

 

Originally all i wanted to do was use a Session Variable to save some data that I could then use on a different page.  I have since done a lot of reading and have found that you cannot do this.  Instead I decided writing a session cookie to do it will be ok in my example and thought it would be easy to do, but I cannot get that to work either.

 

If i create a blazor app with no authentication, using the standard template app can someone please provide me with some code that would write a session cookie when pressing the increment counter button on the counter tab and then read that cookie in on the Fetch Data tab and show it.

 

I cannot believe it is so hard.  It seems easy to do in non Blazor Applications from what i have read. The below would work:

 

 

The problem seems to be the code behind page does not recognise the response object.  

 

Thank you in advance for your help.

 

Daz