How do i disable the left top Ribbon menu icon. Double click on the icon, my application closes. Please see the attachment file.
No, this has not been implemented yet. You can submit another feature request and that will increase the chances that it will get implemented.
Unfortunately, I don't see a good way to determine why the form is closing to only disable it in this case.
There is currently no way to disable this. You can submit a feature request for that ability here: http://devcenter.infragistics.com/Protected/RequestFeature.aspx.