void getList<T>(IQueryable<T> queryable, Expression<Func<T, Object>> selector)
        {
             queryable.Select(selector);
        }

 getList(db.tmpTbl ,a=>new {name=a.Column1});

  static class Helper
    {
        public static IEnumerable<object> SelectAsDynamicObject<T>(this IEnumerable<T> enumerable,
            params string[] propertyName)
        {
            var sb = new StringBuilder("new(");
            foreach (var s in propertyName)
                sb.AppendFormat("it.{0}{1}", s, s == propertyName.Last() ? "" : ",");
            sb.Append(")");
            var parsedExpression = (Expression<Func<T, Object>>)System.Linq.Dynamic.DynamicExpression.
                ParseLambda(new[] { Expression.Parameter(typeof(T)) }, typeof(object), sb.ToString());
            return enumerable.AsQueryable().Select(parsedExpression).AsEnumerable();
        }
    }
/............................................/
 var a = new List<KeyValuePair<int, string>>() { new KeyValuePair<int, string>(1, "sdsd"), new KeyValuePair<int, string>(2, "sdsd") };
            foreach (dynamic o in a.SelectAsDynamicObject("Key", "Value"))
            {
                Console.WriteLine(o.Key);
            }