All it'd take is a single drill hole and re-wiring the sensor, but it near the top of the window and no one's even gonna notice it's there. Like mneary said if you have eaves it's even more perfect you can recess it up, completely out of site.
Where C# is just different from C++. value types and reference types exist (struct is value-type, class is reference-type) value types live on the stack, reference types on the heap; references can point to null (must not be valid) code is packaged in assemblies in C#; no automatic conversion from int to bool in C#; main-function is called Main in C#
C# is compiled into Common Intermediate Language, which is then run by the Common Language Runtime part of the .NET framework, an environment that supports just-in-time compilation. The speed of C# and Java is almost as fast as true compiled language. As far as speed goes, C, C++ and C# all are sufficiently speedy for games and operating systems.