Using custom controls in VS 2008 shows frequent errors like object reference not set to an instance of an object and 'could not be set on prperty'.
I have to use the existing custom control created by other team. But when implemeting those controls in my page show the error as i have mentioned
for an example
Section panel has the property collapsed = true or false but when i use this it shows me an error CustomControls:SectionPanel could not be set on property collapsed. Like this, for all the controls am getting error but not every time.