Can't use ternary operator to assign Linq expression

Question

I just typed the following code:

Expression> expression = 
                fileTypeGroupID.HasValue ? n => n.Document.         


        

Answer 1

fileTypeGroupID.HasValue ? (ContentItem n) => n.Document.MimeType.FileTypeGroupID == fileTypeGroupID.Value
                         : (ContentItem n) => true;

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Note the conditional operator is the correct name for ? : It's an example of a ternary operator (and is the only ternary operator in many programming languages).