Get OperationContracts from DLL file using Assembly

I open DLL files using Assembly class. Now I want to get methods that have [OperationContract] attribute. How to do that?

Assembly assembly = Assembly.LoadFrom(someDLLFilePath);
Type[] classes = assembly.GetTypes();


var foo = from type in assembly.GetTypes()
          where type.GetCustomAttributes(false).OfType<ServiceContractAttribute>().Any()
          from method in type.GetMethods()
          where method.GetCustomAttributes(false).OfType<OperationContractAttribute>().Any()
          select method;

There isn't a single instruction to do that, you have to iterate on methods and see if it has the attribute. You could something like this:

foreach (var type in classes)
  type.GetMethods().Where(m => m.GetCustomAttributes(false).Contains(typeof (OperationContract)));

Try this:

var result = assembly
    .SelectMany(type => type.GetMethods()
                            .Where(method => method
                                .Count() > 0)

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