One does not preclude the other. C# is a pleasure to work with, and a powerful language and environment, but Javascript is the tool for the web-based front end,

One does not preclude the other. C# is a pleasure to work with, and a powerful language and environment, but Javascript is the tool for the web-based front end, and a nice language in its own right. Provided a certain discipline, one can use it to write reliable and maintainable code.