using System;

using System.Collections.Generic;

using System.Reflection;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Dummy1:");

        var dummy1 = new Dummy(); // null, 0, null

        var propertyValues1 = GetPropertyValues<Dummy>(dummy1, false);

        PrintPropertyValues(propertyValues1); // 0

        Console.WriteLine();

        Console.WriteLine("Dummy2:");

        var dummy2 = new Dummy { SomeString = "text", SomeInt = 5 }; // Text, 5, null

        var propertyValues2 = GetPropertyValues<Dummy>(dummy2, false);

        PrintPropertyValues(propertyValues2); // Text, 5

        Console.WriteLine();

        Console.WriteLine("Dummy3:");

        var dummy3 = new Dummy { SomeInt = 5, SomeNullableInt = 10 }; // null, 5, 10

        var propertyValues3 = GetPropertyValues<Dummy>(dummy3, false);

        PrintPropertyValues(propertyValues3); // 5, 10

    }

    public static void PrintPropertyValues(Dictionary<string, string> propertyValues)

    {

        foreach (var property in propertyValues)

        {

            Console.WriteLine("KEY: " + property.Key + ", VALUE: " + property.Value);

        }

    }

    public static Dictionary<string, string> GetPropertyValues<T>(T obj, bool allowNull = false)

    {

        var propertyValues = new Dictionary<string, string>();

        PropertyInfo[] properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);

        foreach (PropertyInfo property in properties)

        {

            object propertyValue = property.GetValue(obj);

            if (!allowNull && propertyValue == null)

                continue;

            propertyValues.Add(property.Name, propertyValue.ToString());

        }

        return propertyValues;

    }

}

​

public class Dummy

{

    public string SomeString { get; set; }

    public int SomeInt { get; set; }

    public int? SomeNullableInt { get; set; }

}