Things I read that might be useful

1) In Game Class:
   
     Properties

• ClientBounds -> returns the dimensions of the window or screen.
• IsActive -> Indicates whether the game is currently the active application.
• IsFixedTimeStep -> Gets or sets a value indicating whether to use fixed time steps.
• TargetElapsedTime -> Gets or sets the target time between calls to Update when IsFixedTimeStep is true
• IsMouseVisible -> Gets or sets a value indicating whether to mouse cursor should be visible

2) Game1 resolutions

//set the desired resolutions

Vector2 screen = new Vector2(640, 480);

if (Use720HD)

screen = new Vector2(1280, 720);

graphics.PreferredBackBufferWidth = (int)screen.X;

graphics.PreferredBackBufferHeight = (int)screen.Y;

graphics.ApplyChanges();

//usable TV resolution is about 90 %

int bx = (int)(screen.X * 0.05);

int by = (int)(screen.Y * 0.05);

workBounds = new Rectangle(bx, by,

(int)screen.X - bx, (int)screen.Y - by);


3) To convert angles in degrees to radians, use the MathHelper.ToRadians method.


4) Layers: value between 0.0f and 1.0f with 1.0f  "on top" and 0.0f is "on bottom".


5) Origin parameter: the point around which the rotation occurs. (i.e. for center would be new Vector2(texture.Width/2, texture.Height/2))