Using C# with Desktopcouch == desktopcouchsharp

using System;
using Newton.Json;
 
namespace Desktopcouch
{
    // define an enum for the address type.
    public enum AddressType{
        HOME,
        WORK,
        OTHER
    }
 
    // and address is not a document but we need to state how
    // to serialize it we use the attribute to let the serializer
    // know we want to add attributes
    // with info of how to serialize the object
    [JsonObject(MemberSerialization.OptIn)]
    public class Address
    {
         #region Serialized Properties
 
         [JsonProperty("country")]
         public string Country { get; set; }
 
         [JsonProperty("state")]
         public string State { get; set; }
 
         [JsonProperty("city")]
         public string City { get; set; }
 
         [JsonProperty("postalcode")]
         public string Postalcode { get; set; }
 
         [JsonProperty("street")]
         public string Street { get; set; }
 
         // because the type is an enum, we will let the
         // serializer know that we will provide him with
         //  the logic to convert it to the correct values
         // rather than ints
         [JsonProperty("type")]
         [JsonConverter(typeof(AddressTypeConverter))]
         public AddressType AddressType { get; set; }
 
         #endregion
 
         #region Constructors
 
         Address ()
         {
              // required for deserialize
         }
 
         #endregion
    }
}

using System;
using Desktopcouch;
 
namespace MacacoExample
{
 
    public class Contact : Record{
 
        #region Properties
 
        [JsonProperty("first_name")]
        public string FirstName { get; set; }
 
        [JsonProperty("middle_name")]
        public string MiddleName { get; set; }
 
        [JsonProperty("last_name")]
        public string LastName { get; set; }
 
        [JsonProperty("addresses")]
        public MergeableList<Address> Addresses{ get; set; }
 
        #endregion
 
        #region Constructors
 
        Contact ()
            : base ("record_type_url"){
            // desrialization reasons
        }
 
        public Contact (string name, 
                            string middleName, 
                            string lastName)
            : base ("record_type_url") {
             Name = name;
             MiddleName= middleName;
             LastName = lastName; 
             Addresses = new MergeableList<Address>();
        }
        #endregion
    }// class
}// namesapce

using System;
using Desktopcouch;
 
namespace Desktopcouch.Example
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			Console.WriteLine ("Create db with name sharp_test");
			var db = new DesktopcouchDatabase ("sharp_test", true);
			// create some contacts to add
			var first = new Contact ("Manuel", "", "de la Pena");
			var firstId = db.PutRecord (first);
			Console.WriteLine ("Added contact with id {0}", firstId);
			var second = new Contact ("Jaime", "", "de la Pena");
			var secondId = db.PutRecord (second);
			Console.WriteLine ("Added contact with id {0}", secondId);
			// Delete the db
			db.DeleteRecord (firstId);
			Console.ReadKey ();
		}
	}
}

var design = db.NewDesignDocument("contacts");
			design.AddView("by_letter", @"function(doc) {
        if (doc.record_type == 'http://www.freedesktop.org/wiki/Specifications/desktopcouch/contact') {
        function first_letter(name) {
            var first_letter = name.substring(0, 1);
            return first_letter.match(/[A-Za-z]/) ? first_letter.toLowerCase() : '0';
        }
 
        try {
            deleted = doc['application_annotations']['Ubuntu One']
                ['private_application_annotations']['deleted']}
        catch (e) {
            deleted = false;}
        if (! deleted) {
            var raw_last = doc.last_name || '';
            var raw_first = doc.first_name || '';
            var raw_company = doc.company || '';
 
            var name_to_test = raw_last || raw_first || raw_company;
 
            var emit_letter = first_letter(name_to_test);
            var emit_last = raw_last.toLowerCase();
            var emit_first = raw_first.toLowerCase();
            var emit_company = raw_company.toLowerCase();
 
            emit([emit_letter, emit_last, emit_first, emit_company], 1);}}}");
			// very important, otherwhise it will not be in the db
			design.Synch();
			var result = db.Query("contacts");
			Console.WriteLine("Count the result", result.Result.Count);