using System.Collections.Generic;

using System.Linq;

using System.Linq.Dynamic.Core;

​

public class Program

{

    public static void Main()

    {

        var qry = new List<SourceClass> { new SourceClass { A = 1  } }.AsQueryable();

        var result = qry.Select<TargetClass>("new(A)").ToArray();

    }

    public class SourceClass

    {

        public int A { get; set; }

    }

​

    public class TargetClass

    {

        public TestEnum A { get; set; }

    }

    public enum TestEnum

    {

        Var1 = 1    

    }

}