Compile Time Errors when assigning HTML content with event handlers to a RenderFragment

[GeeksMinister]

Inside a razor-file in a @code { }, I'm trying to pass in some HTML content inside a RenderFragment-property as it shows in the 2 images above. The errors [CS1662, CS0027, CS0236] only appears when I try to assign a handler to an event. However, the code compiles and everything renders correctly if the events are not touched as shown in the image below.

Visual Studio 2022 - Version 17.14.20
Visual Studio 2026 Insiders - Version: Insiders [11206.111]

@AdmiralSnyder

[AdmiralSnyder]

@davidwengier here's a little more insight. the poblem up there comes from the renderfragment being used in a field initializer, i.e. it doesn't have access to the nonstatic method HandlePreviewTemplateBtnClicked (though the error is a little cryptic.

this slightly modified sample doesn't access a declared member, but uses an implicit lambda:

IEnumerable<CODieGridColumnDefinition> Columns2 =
[
    new()
    {
        FieldName ="deleteme",
        CellTemplate = context => @<IconButton ToolTip="Vorschau" SvgImage=SvgImages.Eye Role=IconButtonRoles.Secondary BubbleButton ImgScale=1.2
                    OnClick=@(() => {}) />,
    }
];

should this error, in general, or should the generated method be static?