score:2
Remove the parameter from your method and make the expression accept two parameters:
public static Expression<Func<MyModel, DateTime, bool>> IsDateOf
= (MyModel p, DateTime d) => p.StartedAt.AddSeconds(p.UtcOffset) == d.Date;
Note I have made it a static field, not a method. Then in your LINQ expression, you need to invoke it:
MyModel.IsDateOf(result.entry, result.rec.DayOf)
If you don't make it a field (or property), you have to first invoke the method to get the expression; then you need to invoke the expression:
MyModel.IsDateOf()(result.entry, result.rec.DayOf)
Which, in my opinion, looks weird.
Source: stackoverflow.com
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