Multiple Order By with LINQ

Question

I start with a basic class that I want to manipulate in a List using LINQ  something like the following   public class FooBar            public virtual int Id   get  set          public virtual string Foo   get  set          public virtual string Bar   get  set        This is what I ultimately found out to solve my problem using the non lambda LINQ stuff      code somewhere else that works and gets the desired results   var foobarList   GetFooBarList        Abstracted out - returns List lt Foobar gt        Interesting piece of code that I want to examine var resultSet   from foobars in foobarList                   orderby foobars Foo  foobars Bar                   select foobars      Iterate and do something interesting   foreach  var foobar in resultSet               Do some code       What I m really curious about is if the same can be accomplished using the Lambda based extension methods off of generic IEnumerable to accomplish the same thing   Google tells me I can do something like the following to accomplish it   var resultSet   foobarList OrderBy x   gt  new  x Foo  x Bar                                Select x  gt x     However if I do that I get a runtime error when I hit the foreach statement   The error tells me that at least one object has to implement IComparible  which I can see that since I m using an anonymous type for the  OrderBy   method   So is there a way to accomplish what I want using the Lambda way

User · Accepted Answer

You can use the ThenBy and ThenByDescending extension methods   foobarList OrderBy x   gt  x Foo  ThenBy  x   gt  x Bar

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