I hate the feature of c# that a member variable can be used as an function!

Let me get this variable. why does my cpu spike?
Because it calls 10 other functions to fill this float when needed.

float progress{
get { return DoWorkInDifferentFunctions(); }
}

Use this instead:

float CalculateProgress(){
return DoWorkInDifferentFunctions();
}

because people will use this like:

if(progress > 10.0f && progress < 25.0f){
DoStuff(progress);
}

Instead of:
float CurrentProgress = CalculateProgress();
if(CurrentProgress > 10.0f && CurrentProgress < 25%){
DoStuff(CurrentProgress );
}

@#$%&*$#^&*!!