Hi,I am working With C#.net Desktop Application,Here I need to store ratio,from date and todate,from date will be given by the User,But to date should be Considered as Infinite,Why I need this means,After a month If i am changing the ratio means,at that time,i will give the from date,but to date shoul be considered as Infinite ,this fromdate.Adddays(-1) will be updated with previous todate,so that i need how to store infinte value for datetime,Thanks in Advance....................