I don’t think XNA has/had it but in Monogame, the GameWindow class has a “Position” property to set the windows position. For example, in your Game class :
this.Window.Position = new Point(200, 50); // xPos and yPos (pixel)
I think it sets the position of the top-left corner of the window so if you know your window size and your screen size, you can find the top-left position that makes the window centered 
Though it is a Windows-only feature according to the source code : https://github.com/MonoGame/MonoGame/blob/develop/MonoGame.Framework/GameWindow.cs