Microsoft.UI.Xaml.Markup.Compiler generates invalid code for init only properties (binding to records)

[adamplonka]

Describe the bug

Tried to use a record as a one way view model but it seems impossible. Microsoft.UI.Xaml.Markup.Compiler generates code like:

        private void set_3_Item_Name(object instance, object Value)
        {
            var that = (global::App5.Item)instance;
            that.Name = (global::System.String)Value;
        }

which generates error CS8852: Init-only property or indexer 'ISomething.Property' can only be assigned in an object initializer, or on 'this' or 'base' in an instance constructor or an 'init' accessor.

Steps to reproduce the bug

1. Create a record type like public record ReadOnlyModel(string Name);
2. Try to bind to it using {x:Bind Name, Mode=OneTime}
3. The project doesn't compile

Expected behavior

Able to bind to properties with init accessor just like to "get only" properties.

Screenshots

No response

NuGet package version

1.0.0

Packaging type

Packaged (MSIX), Unpackaged

Windows version

Windows 11 version 21H2 (22000)

IDE

Visual Studio 2022-preview, Visual Studio 2022

Additional context

No response

[StephenLPeters]

@RealTommyKlein I think this is a dupe but I can't find the issue.

[michael-hawker]

🦙 Duplicate of #5315