Question from the C# - Fundamentals test

What does this algorithm display with the argument:
tab= new int[,] {{1,2},{3,4},{5,6}};
static void AffichageMatrice(int[,] tab){
if(tab==null){
Console.WriteLine("Erreur");
}
for(int i=0;i<tab.GetLength(0);i++){
for(int j=0;j<tab.GetLength(1);j++){
Console.Write(tab[i,j]);
if(j==(tab.GetLength(1)-1)){
Console.Write(" . ");
}
else{
Console.Write(" ; ");
}
}
Console.WriteLine(" ");
}
}