techtalk_scheduling: Avoid crash running solve only one time.

examples/dotnet/techtalk_scheduling.cs

@@ -267,18 +267,14 @@ public class SpeakerScheduling
 
     public static void Main(String[] args)
     {
-        int start = 1;
+        int start = 17;
         if (args.Length == 1)
         {
             start = int.Parse(args[0]);
         }
         Stopwatch s = new Stopwatch();
         s.Start();
-        for (int i = start; i < 40; i++)
-        {
-            Solve(i);
-        }
-
+        Solve(start);
         s.Stop();
         Console.WriteLine("Finished in " + s.ElapsedMilliseconds + " ms");
     }