The C# version uses MorseCodeDecoder in the example tests, but provides an empty Decoder class.
The naming of methods and the MorseCode Dictionary should be in PascalCase (like in the previos parts of this series).

Lua Translation kumited

expected and actual are swapped (at least in the example tests)

I just looked at other languages to determine what type i should use.

I'll keep that in mind

C# Translation kumited

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C# Translation kumited

Java

After spending a long time trying to figure out how to optimize my code I finally decided to give up. However after I did, I tried previous solutions and all of them timed out (including the one from the author).

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The php example test cases call the php round method instead of the roundInteger method that the user wrote.

Brainfuck Translation kumited

Please review and approve.

Rust Translation kumited

Please review and approve.

Rust Translation kumited

Please review and approve.