When it can't be avoided there were (rare) times that I used #includes to split what would have been one long source file into multiple files. (2k lines is stil

When it can't be avoided there were (rare) times that I used #includes to split what would have been one long source file into multiple files. (2k lines is still within my 1 file threshold, but I generally aim for less than 1k lines). Interestingly, C# has partial classes which I have also rarely manually used (automatically generated for forms).