Simplifing acces to singleton

IIn my singleton i want to access the player class very often, i want to optimise a bit this, but how can I write GameManager.Player instead of GameManager.Instance.player?

I have seen on a website : but i dont understand clearly how to do this:

Define static properties and methods for public variables and methods that are used often from outside the class. This allows you to write GameManager.Player instead of GameManager.Instance.player.

You could define a static property like this:
public static PlayerType Player
{
get
{
return Instance.player;
}
}