Breakpoints don't work on Linux. Why can this be?

Question

linux

Breakpoints don't work when running in vs code or jetbrains rider. I am running a program and I want to get the result of this method. at runtime, I put a breakpoint at any point and it doesn't fire.
They work for me only if they are set before debugging starts and if in this method I put the output on the console.
The code executes adequately and the output works. It's just that the method works for a very long time and I want to see what iteration after 15 seconds.

static double Result()
        {
            double result = 2;
            for (int i = 3; i < 2000000; i+=2)
            {
                bool check = true;
                for (int k = 2; k <= i / 2; k++)
                    if (i % k == 0)
                    {
                        check = false;
                        break;
                    }

                if (check)
                    result += i;
            }

            return result;
        }

Answer 1

Most obvious build in Debug mode?
In addition, use the classes from System.Diagnostics
Debug
Trace
To display values, they are even better in something for monitoring values