How do I do a "like" wildcard comparison in Entity Framework in .NET 4.0?

I'm using the Visual Studio 2010 RC for .NET 4.0 and I'm trying to figure out how to do a wildcard comparison with Entity Framework.

I'd like to have the following query for EF where I find all the names that start with 'J'

select * from Use开发者_JAVA技巧rs where FirstName like 'J%'

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from user in Users where user.FirstName.StartsWith("J") select user;

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Use:

var query = Users.Where(user => user.FirstName.StartsWith("J"));

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I would refer you to this question, I assume it hasn't changed in .net 4.0