Converting Linq to Sql query to Linq to entity

[Swiftain]

Hi, I tried running the following linq to sql query in linq to entity

        var req = dbContext.Requisitions.First(r=>r.ID==new Guid(Request\["ReqID"\]));

I got the following error "Only parameterless constructors and initializers are supported in LINQ to Entities." Any ideas how to go about this? Thanks

[Swiftain]

Got a work around, did something like this

        Guid ReqID = new Guid(Request\["ReqID"\]);
        
        var req = dbContext.Requisitions.First(r => r.ID == ReqID);