Schema Error Telerik Type cannot be Resolved

Environment

Product	Progress® Telerik® UI for .NET MAUI
Product Version	4.0.0

Description

When I try to use the Telerik UI for .NET MAUI ComboBox component, I get the XamlC error XFC0000: Cannot resolve type "http://schemas.telerik.com/2022/xaml/maui:telerik:control". How can I handle this issue?

Steps to Reproduce

Start using a custom controls library and add a common schema namespace.

Error Message

XamlC error XFC0000: Cannot resolve type "http://schemas.telerik.com/2022/xaml/maui:telerik:control".

Cause

This common schema error is not related to the Telerik UI for .NET MAUI controls, but is a logged issue that stems from the .NET MAUI framework when the customer uses custom controls, that is, controls that are not provided by Microsoft .NET MAUI.

Solution

To work around this undesired behavior, add a x:Name to the control, for example:

    <telerik:RadComboBox x:Name="combo"/>

An alternative approach is instead of using the schema, to add the namespace of the control:

    <telerikCombo:RadComboBox/>

Then, add the common telerik namespace:

xmlns:telerikCombo="clr-namespace:Telerik.Maui.Controls;assembly=Telerik.Maui.Controls"