Why am I recieving unknown type Customers in xml namespace test?

Thomas Fischer 21

I add the example Xaml and C# code for Customers for a Xmal listbox and when I build the project I receive unknown type Customers in xml namespace test. Why? My C# namespace is test and Customers is a class in that namespace exactly as in the example given in ResourceDictionary Class. Please help me understand what I am missing here.

Fay Wang - MSFT 5,191 Reputation points

2020-09-03T02:36:14.6+00:00

When I tried to create a Customers class and used it, it worked well, I didn't receive any exception. Could you please provide us a simple repo code by using OneDrive or Github?