[AspNetCore] incorrect decoding of string parameters

[Daniel-Svensson]

Describe the bug

Url parameters are url decoded twice which means that values containing values such as %20 and similar values that can be url decoded are not passed correctly to the server for GET requests.

To Reproduce

Pass in a string containing such as "%20" to a Get method or an Invoke with no side effects.

Expected behavior
Server sees the value "%20" as parameter

**Actual **
However the server sees value " "