Added some vars and funcs for testing. Added more fair fps counter and frame counter

2DGAMELIB/_2DGAMELIB/FrameTimeCounter.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Text;
+
+namespace _2DGAMELIB
+{
+    internal class FrameTimeCounter
+    {
+        private readonly Stopwatch sw = Stopwatch.StartNew();
+        private long lastTicks;
+        public double FrameMs { get; private set; }
+
+        public void Frame()
+        {
+            long now = sw.ElapsedTicks;
+
+            if (lastTicks != 0)
+            {
+                FrameMs = (now - lastTicks) * 1000.0 / Stopwatch.Frequency;
+            }
+
+            lastTicks = now;
+        }
+    }
+}