Execute C# code with side effects on breakpoint - visual-studio

Question

I would like to use a breakpoint to execute code in Visual Studio 2017 and have the side effects of that code affect the program. It appears from Execute code when breakpoint is hit? that this was possible in a past version of Visual Studio.
But consider the code below.
int Counter = 0;
public bool Increment()
{
Counter++;
return false;
}
public void PrintNumbers()
{
for (int i = 0; i < 3; i++)
{
Debug.WriteLine($"Iteration {i}");
}
Debug.WriteLine("Counter: " + Counter);
}
I have set a breakpoint on the line that runs the "Iteration" as follows:
When this runs, it produces the following output:
Iteration 0
Iteration 1
Iteration 2
Counter: 0
This is a true technological marvel! Visual Studio does run the code -- if I change the "return false" in Increment() to "return true," the breakpoint will be hit. But it magically avoids side effects. That's great! But I want side effects. In other words, I really want an action option besides "log a message to output windows" that allows execution of code with side effects. Is there any way around this Visual Studio feature?
You might be wondering why I want to do this. I would like to make a conditional breakpoint dependent on another conditional breakpoint having been passed. (For example, I know that the Knight is talking funny after meeting the Princess, so I want to put a breakpoint on KnightTalks() that stops only if some code in KnightMeetsPrincess() has executed. I run into situations this all the time and get annoyed when I have to disable the KnightTalks breakpoint and reenable it after KnightMeetsPrincess, especially when there is a longer chain of events.) Based on Conditional breakpoint depends on other breakpoint, I think there is no built-in way to do this. But I could do something like it if I could execute arbitrary code -- for example, if I could set and get a pseudovariable. Or one could use code like the following:
public static class Bookmark
{
static Dictionary<string, int> HitCounts = new Dictionary<string, int>();
public static bool Set(string s)
{
if (!HitCounts.ContainsKey(s))
HitCounts[s] = 1;
else
HitCounts[s]++;
return false;
}
public static bool Set(string s, bool condition)
{
if (condition)
Set(s);
return false;
}
public static bool Get(string s)
{
return HitCounts.ContainsKey(s);
}
}
The idea of this code was that I would put a conditional breakpoint on KnightMeetsPrincess that called Bookmark.Set("KnightMeetsPrincess") and then on KnightTalks, a separate conditional breakpoint called Bookmark.Get("KnightMeetsPrincess"). Alas, this doesn't work because the code executes, but without side effects.
Any workarounds?