Mutan is a statically typed, concurrent, garbage-collected programming language with an emphasis on code readability. It was designed by Walter Bright and released in 2014.
Mutan's syntax is inspired by C#, but with some important differences. For example, Mutan has no notion of classes or inheritance. Instead, it uses a simple struct system to define data types. This makes code more concise and easier to read.
Mutan is designed to be a safe and concurrent language. It achieves this by using a "message passing" model for communication between threads. This means that threads can only communicate with each other by sending messages. This eliminates the possibility of data races and makes it easy to write correct concurrent code.
Mutan is also garbage collected, which means that you don't have to worry about freeing memory yourself. This makes code simpler and more reliable.
Overall, Mutan is a simple, safe, and concurrent programming language that is easy to read and write. If you're looking for an alternative to C#, then Mutan is definitely worth checking out.