[brighteyes]

Yes, leaks are possible in all languages.

In Rust you can leak due to reference cycles for example: https://doc.rust-lang.org/book/ch15-06-reference-cycles.html

C# will clean up reference cycles, but an unintended reference can cause leaks (if you forget to remove it).

In both languages such leaks are not good, but at least they aren't memory safety issues.