Setting Global dateTime format for an application

Hi ,

I have created an application where i have a requirement to convert string date to datetime. For this I have used Convert.DateTime,DateTime.ParseExact,DateTime.TryParse etc.It works fine with some client machine but for some client machine it doesn't work due to different date format on client machine.I want a global format for my application so that i  have no problem of client machine .

SaiVaibhav@Acumen