Multiple Order By in LINQ

This is how you do it:

List orderedItems = items.OrderBy(o => o.Group).ThenBy(o => o.Name).ToList();

Example Code:
Class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestLinqOrderBy
{
    

    class SomeItem
    {
        private String _group;
        private String _name;
        
        public SomeItem(String group, String name)
        {
            this._group = group;
            this._name = name;
        }

        public String Group
        {
            get { return _group; }
            set { _group = value; }
        }

        public String Name
        {
            get { return _name; }
            set { _name = value; }
        }
    }
}

Main

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestLinqOrderBy
{
    class Program
    {
        static void Main(string[] args)
        {
            List items = new List();

            items.Add(new SomeItem("group 1","All"));
            items.Add(new SomeItem("group 1","How"));
            items.Add(new SomeItem("group 1","Are"));
            items.Add(new SomeItem("group 1","You"));
            items.Add(new SomeItem("group 1","Today?"));
            items.Add(new SomeItem("group 1", "Cat"));
            items.Add(new SomeItem("group 1", "Ball"));

            items.Add(new SomeItem("group 2", "All"));
            items.Add(new SomeItem("group 2", "How"));
            items.Add(new SomeItem("group 2", "Are"));
            items.Add(new SomeItem("group 2", "You"));
            items.Add(new SomeItem("group 2", "Today?"));
            items.Add(new SomeItem("group 2", "Cat"));
            items.Add(new SomeItem("group 2", "Ball"));

            items.Add(new SomeItem("group 3", "All"));
            items.Add(new SomeItem("group 3", "How"));
            items.Add(new SomeItem("group 3", "Are"));
            items.Add(new SomeItem("group 3", "You"));
            items.Add(new SomeItem("group 3", "Today?"));
            items.Add(new SomeItem("group 3", "Cat"));
            items.Add(new SomeItem("group 3", "Ball"));

            List orderedItems = items.OrderBy(o => o.Group).ThenBy(o => o.Name).ToList();

        }
    }
}

Thanks to Jonas Stawski