How do you get CTRL + ' to work in Microsoft Visual Studio?

I'm very new to unity and I was doing the roll a ball tutorial and we got to the part in coding the rigid body. So I go to edit the script and it takes me to MS Visual Studio, and I tried using the CTRL + ' shortcut but it didn't work, this little box in top right called "team explorer" just had a blue tab and nothing happened. Can someone please help me with this?