using System;

using System.Collections.Generic;

using System.Data;

using System.Data.SqlClient;

using System.Linq;      

public class Program

{

    class MyClass

{

    public int Value1 {get; set;}

    public int Value2 {get; set;}

    public int Value3 {get; set;}

    public int Value4 {get; set;}

​

    public string AnotherValue {get; set;}

}

    public static void Main()

    {

        MyClass a = new MyClass()

            {

                Value1 =  10,

                Value2 = 11,

                Value3 = 12,

                Value4 = 14

            };

​

          var result  = a.GetType()

                .GetProperties()

                .Where(x => x.PropertyType == typeof(int) )

                .Select(x => Convert.ToInt32(x.GetValue(a))).Max(x=>x);

        Console.WriteLine(result);

    }

}