The thing I miss the most with C# and dotnet is offline documentation. With Java, I can install the java-17-openjdk-javadoc package and have the full API reference (at /usr/share/javadoc/java/index.html), and download a couple of PDF files to have also the full language and bytecode specification. With Rust, I can install the rust-doc package and have the full API and language reference (at /usr/share/doc/rust/html/i…
The browsy bits might not work without a server (not sure), but the documents themselves are markdown.