Populating values into a C# object
A few things straight away:

You have a class called India which really just holds a collection of States. I would suggest not using that class at all, instead creating a List&lt;State&gt; States instead.

Info as a suffix is fairly meaningless, particularly when the object is a collection.

You also do not need to put obj in front of objects you create. In C#, everything is an object, so that means absolutely nothing.

In addition, the names you've chosen for parameters are particularly bad. Asia might be a good value, but continent is a far better variable name.

Last of all, you may want to use object initializers:

public class Country
{
    public string Name { get; set; }
    public string Continent { get; set; }
    public string Zone { get; set; }
    public List&lt;State&gt; Country { get; set; }
}

public void PopulateCountry(string name, string continent, string timeZone, string stateCode, string stateName)
{
    var state = new State
    {
        StateCode = stateCode,
        StateName = stateName
    }
    var country = new Country
    {
        Continent = continent,
        Name = name,
        Zone = timeZone,
        Country = new List&lt;State&gt; { state }
    }
}


This isn't everything you can do. It may make more sense to make a Country class if you plan on adding other things to it. This at the very least makes your code simpler, though.

Alternatively, you could assign a country like this, anywhere:

var country = new Country
{
    Continent = continent,
    Name = name,
    Zone = timeZone,
    Country = new List&lt;State&gt;
    {
       new State
       {
           Name = stateName1,
           Code = stateCode1
       },
       new State
       {
           Name = stateName2,
           Code = stateCode2
       },
    }
}


Or even:

var country = new Country
{
    Continent = continent,
    Name = name,
    Zone = timeZone
}
country.Country = names.Zip(codes, (x, y) =&gt; new State { Name = x, Code = y };


Or something close to it, assuming the two are in the correct order. You have many options.