Insert record with List<classname>

[Emre]

I have radgrid with using List<Classname> for datasource.When I insert the data,new data replace with old data and old data is disappearing.How can I insert new data to the grid without losing old one? 

[Jayesh Goyani]

Hello,

Can you please provide your insertcommad code and grid binding code.

Thanks,
Jayesh Goyani