hi friends, i am new to this forum. please help me out. i have developed one windows application in .net 2.0 ( using c#).problem is that exe of application expires automatically after few days.I have published the application in past from that day this problem starts.exe expires automatically from my bin folder and it gives message like this........"This is not valid win32 application". then i rebuild the entire application then it start to work but after few days it again gives the same message, so i am not getting that what is the problem with exe.