C:/Doug/CSharp/XnaCollisionLib/XnaCollisionLib/Utils/FPSCounter.cs

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using System;
using Microsoft.Xna.Framework;

namespace XnaCollisionLib.Utils
{
    public class FPSCounter
    {
        private float _Seconds;
        private int _Frames;
        private int _FPS;

        public FPSCounter()
        {
            _Seconds = 0;
            _Frames = 0;
            _FPS = 0;
        }

        public int FPS
        {
            get { return _FPS; }
        }

        public void Update(GameTime gameTime)
        {
            _Seconds += (float)gameTime.ElapsedGameTime.TotalSeconds;
            _Frames++;
            if (_Seconds >= 1)
            {
                _FPS = _Frames;
                _Frames = 0;
                _Seconds = 0;
            }
        }
    }
}