The amount of game time since the start of the game.
Assembly: Microsoft.Xna.Framework.Game (in microsoft.xna.framework.game.dll)
Fixed-step clocks update by a fixed time span upon every clock step. This results in uniform clock steps that may not actually track the wall clock time. Fixed step clocks were popular on console systems where one had tight control over code and a fixed system performance. Fixed-step clocks are also useful when trying to achieve deterministic updates for debugging, offline rendering, or other such scenarios.