On storing value to ViewState issue is coming

Question

I am placing my above code in the screen shot as

The error screenshot is

On placing this line I mean storing value to viewstate issue is coming, on deleting this line issue get resolves.

Whats the issue I dont know, Please suggest

Answer 1

As the error says, you need to mark your CommissionDistributionInfo class with the [Serializable] attribute.

[Serializable]
public class CommissionDistributionInfo
{
    // implementation...
}