Add demo

Src/Asp.Net/SqliteTest/Demo/Demo1_Queryable.cs

@@ -56,6 +56,11 @@ namespace OrmTest
                 names = SqlFunc.Subqueryable<Order>().Where(z => z.Id == it.Id).SelectStringJoin(z => z.Name, ",")
             })
          .ToList();
+            var test08 = db.Queryable<Order>().Select(it => new
+            {
+                names = $"as{it.Id}fd{it.Id}a"
+            })
+       .ToList();
             Console.WriteLine("#### Examples End ####");
         }