Preventing multiple instances of my application
73227
How to block running two instances of the same program?
41484
Ensure a single instance of an application in Linux
65527
CA2202: Do not dispose objects multiple times
108006
Run multiple instance of any windows application
100595
How to prevent Multiple Toast Overlaps
125941
Prevent users from starting multiple accounts?
127557
How do you prevent specific class scripts from transfering to all classes?
18440
How to prevent suspension when a program is currently running?
10053
How can I stop applications and services from running?
99307
How can I safely (and easily) count *all* instances of a class within my program?
84345
How can I tell if another instance of my program is already running?
105337
How can I run multiple copies of the same app?
138264
Lock-down iPhone/iPod/iPad so it can only run one app
122798
Prevent selecting & copying
134979
Multiple simultaneous browser sessions
117360
Check if the application is already installed
152233
Do multiple instances of the Extra Attack feature stack?