Improve documentation of the Route-object

[xivk]

Thanks for the pull request but this won't be accepted, comments and remarks are two different things.

The summary tag is meant for shorter descriptions, max one sentence. Add more details in a remark tag.

See examples: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/xmldoc/examples

See recommendations: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/xmldoc/recommended-tags