LINQ Select Distinct Count in Lambda form

Given a linq expression of an object collection 'items' such as this:

var total = (from item in items sel开发者_开发技巧ect item.Value).Distinct().Count()

Is it possible to convert this to use linq functions/lambdas:

items.Select(???).Distinct().Count()

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Use this:

items.Select(i => i.Value).Distinct().Count()

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It must be possible, since behind the scenes, LINQ is translated to lambdas and expression trees (at least LINQ to objects)

In your case the ??? part would be item => item.Value, i.e. for item, output item.value. So, the whole expression will be

var total = items.Select(item => item.Value).Distinct().Count();