Hello all... can anyone clarify my doubts... 1. What is the namespace to be declared if we are using both SqlServer and Oracle in a single appllication...... 2. Where is the viewstate comes in asp.net life cycle 3. In a class if i declare a method of reference type , can i convert this reference type method to value type......... 4. In one project i am selecting a Date from a popup calender window, the selected date will appear in the Textbox...........while submitting the page, it is showing the error like............error in converting the variable into Date.............. the datatype which i have used to create the table in sql server for that date field is DATETIME...............How can i avoid that error........i am to store the selected date into database if am declaring the variable as varchar........, but i want to declare the variable as DATETIME .... thanks & regards suresh babu | 
