//In Update method of the class (in this case player.cs):
TimeAtFrame += (float)_gameTime.ElapsedGameTime.TotalSeconds;

//In Draw method of class:
                if (TimeAtFrame >= .1f)
                {
                    CurrentFrame++;
                    TimeAtFrame -= .1f;
                    if (CurrentFrame > standing_FrameCount - 1)
            {
                        CurrentFrame = 0;
                        }
                }