Let's talk about increasing speed & productivity in Blueprint.

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Really, whats the Point of C#? I never understood this.
What is so “productive” about C#?

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The Visual support for C# is absolutely phenomenal. The “visual assist” type tools and re-factoring tools are better than any available for C++. If you rely on the IDE to tell you what you can do, especially if you are bad at memorizing function names or slow at typing, this is a time saver for the part of programming that’s “typing things and moving them around in source files.”
Additionally, C# is garbage collected, and thus, you can defer thinking about memory management, and when your object approach ends up causing random stalls every 30 seconds, you simply blame the runtime and tell the producer you won’t fix it.
Saves lots of time!

Also, if you already know C#, but don’t know C++, then clearly C# saves time, because you don’t have to learn a new language.