I do have .net 4.8 installed. When i create a new simple asp.net mvc application using visual studio 2019 and start the website using the builtin IIS-Express, it will add the following header:
- x-aspnet-version: 4.0.30319
The same header is also added when i’m hosting the site using IIS. I am aware that i can remove this header (and i will), but i would like to understand the version number.
It seems version 4.0.30319 was the initial .net 4.0 version number. What is the point to have this in the http header when using .net 4.8?
Answers:
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Method 1
That is the CLR version.
- All .NET Framework 4 versions use CLR 4.0.30319.xxxxx
- xxxxx is less than 42000 for .NET Frameworks 4 to 4.5.2
- xxxxx is greater than 42000 for .NET Frameworks 4.6 and higher
The xxxxx extension is not part of the header for security purposes, so as not to divulge the patch state of the server.
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