動態創建匿名類型時，“參數表達式無效”

我正在創建一個表達式樹構建器來返回自定義匿名類型。我首先使用離散類型嘗試它並且它工作正常，但使用TypeBuilder在運行時構建類型並將該類型傳遞給表達式樹失敗並顯示此錯誤

'Argument expression is not valid'

這是我使用的代碼：

這個方法我用來創建匿名類型

private Type CreateAnonymousType(Dictionary<string, Type> properties)
    {
      AssemblyName dynamicAssemblyName = new AssemblyName("MyAssembly");
      AssemblyBuilder dynamicAssembly = AssemblyBuilder.DefineDynamicAssembly(dynamicAssemblyName, AssemblyBuilderAccess.Run);
      ModuleBuilder dynamicModule = dynamicAssembly.DefineDynamicModule("MyAssembly");

      TypeBuilder dynamicAnonymousType = dynamicModule.DefineType("ReturnType", TypeAttributes.Public | TypeAttributes.Class | TypeAttributes.AutoClass);
      foreach (var p in properties)
      {
        dynamicAnonymousType.DefineField(p.Key, p.Value, FieldAttributes.Public);
      }

      return dynamicAnonymousType.CreateType();
    }

這是我創建表達式樹的方法

var cars = new List<Car>();
      for (int i = 0; i < 10; i++)
      {
        cars.Add(new Car { Id = i, Name = "Car " + i, Age = 2010 + i });
      }


      IQueryable<Car> allCars = cars.AsQueryable();

      var properties = new Dictionary<string, Type>
      {
        { "Id", typeof(int) },
        { "Name", typeof(string) }
      };

      ParameterExpression x = Expression.Parameter(typeof(Car), "x");
      var listMembers = properties.Select(p => Expression.Property(x, p.Key));

      var returnType = CreateAnonymousType(properties);
      object destObject = Activator.CreateInstance(returnType);


      var listBind = listMembers.Select(p => Expression.Bind(returnType.GetField(p.Member.Name), p));

      var result = Expression.New(returnType);
      var initExp = Expression.MemberInit(result, listBind.ToArray());


      var call = Expression.Call(typeof(Queryable), "Select",
          new Type[] {
            typeof(Car),
            returnType
        }
        , Expression.Constant(allCars)
        , Expression.Lambda(initExp, x));

      var qResult = allCars.Provider.CreateQuery<IdName>(call);

      foreach (var car in qResult)
      {
        Console.WriteLine(car.Id + " - " + car.Name);
      }

CreateQuery方法執行時發生錯誤