How to create Hierachy Grid from Objects

Good Day All

I have a Class that is defined like this

namespace EAVV
{
    public class EAV
    {

        private string _Attribute;
        private string _Value;



        public string Attribute
        {
            get
            {
                return _Attribute;
            }

            set
            {
                _Attribute = value;
            }

        }

        public string Value
        {
            get
            {
                return _Value;
            }
            set
            {
                _Value = value;
            }

        }

        public EAV(string AttributeEA, string ValueEA)
        {
            this._Attribute = AttributeEA;
            this._Value = ValueEA;

        }

        public EAV()
        {


        }

    }
}

And I have another one to process this like this

namespace EAVV
{
    public class EAVProcess
    {

        public List<EAV> GetRecords(List<string> ParentRecords,List<string> ChildRecords)
        {
          List<EAV> Final= new List<EAV>();

          for (int i = 0; i < ParentRecords.Count; i++)
          {

              for (int J = 0; J < ChildRecords.Count; J++)
              {
                  Final.Add(new EAV(ParentRecords[i], ChildRecords[J]));
              }
          }

          return Final;
        }

        public EAVProcess()
        {
        }
    }
}

And as you can see this will return a list. So I am binding my Grid(Telerik) which is the same as binding the normal asp.net grid like this

                        RadGrid1.DataSource = EAVobj.GetRecords(ParentRecordsRow, ChildRecordsField); 
                            RadGrid1.DataBind();

And I get the Following Data
http://www.telerik.com/ClientsFiles/212012_grid-hierachy.JPG

from the Image, You can see there is an Attribute Column and there is a Value Column, Now what i want to do is that i want to have only one Country and one Event in the Attribute and the Values must be nested underneath each other in a Grid, so basically i need a nested View and the Attribute is the parent and the Values will be grouped according to their parent.

Thanks

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