RESOLVED - VB implicit variable typing

[BruceG]

Hello,
I have 2 VB projects open in VS 2019 on the same computer, one is my main project, the other is a proof-of-concept program written by a colleague. I am copying over some code from the proof-of-concept project to the main one.
In my colleague's code, there will be statements like:
"Dim request = New MailKit.FetchRequest(MailKit.MessageSummaryItems....etc."
and if I hover "request", VS indicates that the type is "MailKit.FetchRequest".
When I copy this over to the main project, VS doesn't "know" what the type is, and reports that it is "Object".

How do I make the main project recognize the type?
(As it is, I have to do "Dim request As MailKit.FetchRequest = New MailKit.FetchRequest(MailKit.MessageSummaryItems....etc.")