Question

The error I am facing is

Delegate ‘System.Func< MyWebSiteApp.Models.FontCategory,int,bool >’
does not take 1 arguments

var s = db.FontCategories.Include("Fonts").
                Where(s=>s.Fonts.Where(s=>s.Inactive == false).ToList();

Any clu how to fix it?

Answer 1

I think you’re after the Linq Any. This will return the font categories that contain at least one active font:

var s = db.FontCategories.Include("Fonts").
    .Where(s => s.Fonts.Any(s => s.Inactive == false)).ToList();

The problem with your existing code is that Where expects a Predicate<FontCategory> type (ie, a lambda that returns true/false), but your lambda returns IEnumerable<Font> instead. Hence the error.

From the documentation for Any:

Determines whether any element of a sequence exists or satisfies a condition.