Ignition switch keeping the key

[Chuck Pierce]

Went out to run an errand this am. and when starting the car the starter 
stayed engaged. Turned off car restarted and it worked correctly.
Arrived at first stop and the car would turn off, but the key would not 
come out of the ignition. The car electrical system does turn all the 
way off, just cannot get the key out.
Lock car car with separate key, ( this car has an ignition key and 
separate key to lock it up, a nice feature at the moment. Which might 
mean the ignition switch has been changed before).
I  go to start the car to leave and it starts and when returning the 
switch to what was the run position it turns off.
I restart and not turn the key as far the car stays running.
So I get the feeling that I am about the replace the ignition switch.
So any BTDT's will be appreciated.
Yes the key is still in the ignition.

Chuck
91 200tq 20v Avant ............with a short shifter that will wait