gistfile1.txt

var myArchetype = new ArchetypeModel()
    {
        Fieldsets = new List<ArchetypeFieldsetModel>()
        {
            new ArchetypeFieldsetModel()
            {
                Alias = "fs1",
                Properties = new List<ArchetypePropertyModel>()
                {
                    new ArchetypePropertyModel()
                    {
                        Alias = "prop1",
                        Value = "foo",
                        
                    },
                     new ArchetypePropertyModel()
                    {
                        Alias = "prop2",
                        Value = "bar",
                        
                    }
                }
            },
            new ArchetypeFieldsetModel()
            {
                Alias = "fs2",
                Properties = new List<ArchetypePropertyModel>()
                {
                    new ArchetypePropertyModel()
                    {
                        Alias = "prop1",
                        Value = "foo",
                        
                    },
                     new ArchetypePropertyModel()
                    {
                        Alias = "prop2",
                        Value = "bar",
                        
                    }
                }
            }
        }
    };
        
    myArchetype.SerializeForPersistence();