FindingPrimes C# Console Program

Program.cs

using System;
using System.Collections.Generic;

namespace FindingPrimes
{
    class Program
    {
        static void Main(string[] args)
        {
            int runs = 10;
            int startNumber = 1;
            int endNumber = 200000;

            for (int i = 0; i < runs; i++)
            {
                List<int> primes = new List<int>(20000);
                int numberOfPrimes = 0;
                bool foundPrime = false;

                var watch = System.Diagnostics.Stopwatch.StartNew();
                for (int candidateNumber = startNumber; candidateNumber <= endNumber; candidateNumber++)
                {
                    foundPrime = true;
                    for (int divNumber = 2; divNumber < candidateNumber; divNumber++)
                    {
                        if (candidateNumber % divNumber == 0)
                        {
                            foundPrime = false;
                            break;
                        }
                    }

                    if (foundPrime)
                    {
                        primes.Add(candidateNumber);
                        numberOfPrimes++;
                    }
                }
                watch.Stop();

                Console.WriteLine($"Find all primes up to: {endNumber}");
                Console.WriteLine($"Time elasped: {String.Format("{0:0.00}", watch.ElapsedMilliseconds * .001f)} seconds");
                Console.WriteLine($"Number of primes found {primes.Count}");
            }
        }
    }
}