using System;

using System.Linq;

using System.Collections.Generic;

using System.Reflection;

​

public static class MainClass

{

    public static class SubClass

    {

        public static string str { get; set; }

        public const long poperty1 = 365635;

​

        public const long poperty2 = 156346;

        public const long poperty3 = 280847;

    }

​

    public static class SubClass2

    {

        public const long poperty4 = 36351526;

​

        public const long poperty6 = 152415;

        public const long poperty7 = 280114157;

    }

    public static bool FindProperty(string className, IEnumerable<long> list)

    {

        var allSubClass = typeof(MainClass).GetMembers().Where(m => m.MemberType == System.Reflection.MemberTypes.NestedType);        

​

        var classLookingFor = allSubClass.FirstOrDefault(c => string.Equals(c.Name, className, System.StringComparison.InvariantCultureIgnoreCase));

        if (classLookingFor == null)

        {

            Console.WriteLine("Class {0} not found.", className);

            return false;

        }

        else

        {

            var allProp = (classLookingFor as TypeInfo).DeclaredFields.Where(f => f.FieldType == typeof(long));

            var anyPropWithValue = allProp.Any(p => list.Any(lng => lng == (long)p.GetValue(null)));

            return anyPropWithValue;            

        }

    }

}

public class Program

{

    public static void Main()

    {

        var list = new List<long> { 36351526, 365635, 280847 };

        Console.WriteLine(MainClass.FindProperty("SubClass", list) ? "At least one property found" : "Could not find any property that hold any of the value passed in.");

        Console.WriteLine(MainClass.FindProperty("SubClass2", list) ? "At least one property found" : "Could not find any property that hold any of the value passed in.");

        Console.WriteLine(MainClass.FindProperty("SubClass24", list) ? "At least one property found" : "Could not find any property that hold any of the value passed in.");

    }

}