Convert a dotNet C# object into RDF (Turtle)

objectToTurtle.cs

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

// just some rough playing around converting an object to RDF Turtle.

class ObjectToTurtle
{

    [System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Struct)]
    public class ObjectIDAttribute : System.Attribute
    {
        private string id;

        public ObjectIDAttribute(string id)
        {
            this.id = id;
        }

        public string GetObjectID()
        {
            return id;
        }

    }



    [ObjectID("id")]
    public class Organization
    {
        public int id { get; set; }
        public string name;
        public User[] users { get; set; }
    }


    [ObjectID("id")]
    public class User    
    {
        public int? id { get; set; }                     
        public string login { get; set; }               
    }






    public static void Test()
    {

        // some data

        Organization[] organizations = new Organization[] { 
            new Organization { 
                id = 1, 
                name = "llc", 
                users = new User[] {
                    new User { id=1, name="jane" }, 
                    new User { id=2, name="bob" }
                }
            }, 
            new Organization { 
                id = 2, 
                name = "inc", 
                users = new User[] {
                    new User { id=3, name="mary" }, 
                    new User { id=4, name="joe" }
                }
            }
        };


        // convert it

        string rdf = "";
        Examine(events, ref rdf, "http://fynydd.com/example#");

        System.IO.File.WriteAllText("c:\\temp\\turtle.ttl", tx);
        System.Diagnostics.Process.Start("c:\\temp\\turtle.ttl");


    }


    public static List<string> Examine(object obj, ref string output, string defaultgraph = "" )
    {

        if(String.IsNullOrEmpty(output) && !String.IsNullOrEmpty(defaultgraph))
        {
            output = "@prefix : <" + defaultgraph + "#> .\r\n\r\n";
        }


        List<string> items = new List<string>();
        
        Type otype = obj.GetType();

        if (otype.IsArray)
        {
            foreach (object objX in (Array)obj)
            {
                items.AddRange(Examine(objX, ref output));
                
            }

            return items;

        }


        // find ObjectID property

        System.Reflection.MemberInfo info = obj.GetType();
        object[] attributes = info.GetCustomAttributes(false);

        string idattribute = "?";

        foreach(object attribute in info.GetCustomAttributes(false))
        {
            if(attribute is ObjectIDAttribute)
            {
                ObjectIDAttribute x = (ObjectIDAttribute)attribute;
                idattribute = x.GetObjectID();

            }

        }

        // determine object ID

        string id = Guid.NewGuid().ToString();
        if (!String.IsNullOrEmpty(idattribute) && obj.GetType().GetProperty(idattribute) != null)
        {
            object idvalue = obj.GetType().GetProperty(idattribute).GetValue(obj, null);
            if (idvalue != null)
                id = idvalue.ToString();
        }

        items.Add(id);


        string type = obj.GetType().ToString();

        string prefix = "    ";

        

        output += ":" + CleanClassName(obj) + "_" + id + "\r\n";
        output += prefix + "a :" + CleanClassName(obj) + " ;\r\n";

        string output2 = "";

        foreach (System.Reflection.PropertyInfo p in obj.GetType().GetProperties())
        {
            object x = p.GetValue(obj, null);

            if (x!=null)
            {
                output += prefix + ":" + p.Name + " ";

                string xtype = x.GetType().ToString();

                if (x is System.Boolean)
                    output += ((bool)x).ToString().ToLower();
                else if (xtype.StartsWith("System.Int"))
                    output += x.ToString();
                else if (xtype.StartsWith("System"))
                    // http://www.w3.org/TeamSubmission/turtle/#sec-strings
                    output += "\"" + x.ToString().Replace("\\","\\\\").Replace("\r","\\r").Replace("\n","\\n").Replace("\"","\\").Replace(">","\\>").Replace("\t","\\t") + "\"";
                else
                {
                    List<string> items2 = Examine(x, ref output2);
                    if(items2.Count>1) 
                        output += "(\r\n";
                    foreach (string ll in items2)
                    {
                        if (items2.Count > 1) output += prefix + prefix;
                        output += ":" + CleanClassName(x) + "_" + ll + " ";
                        if (items2.Count > 1) output += "\r\n";
                    }
                    if (items2.Count > 1) output += prefix + ")";
                }

                output += " ;\r\n";
            }


        }

        output = output.Substring(0, output.Length - 3) + " .\r\n\r\n";

        output += output2;


        return items;


    }


    public static string CleanClassName(object obj)
    {
        string name = obj.GetType().ToString();
        int x = name.IndexOf("+");
        if (x > 0)
            name = name.Substring(x + 1);
        name = name.Substring(0, 1).ToLower() + name.Substring(1).Replace("[]","");
        return name;
    }



}

output.ttl

@prefix : <http://fynydd.com/example#> .

:organization_1
	a :organization ;
	:id 1 ;
	:name "llc" ;
	:user (
		:user_1
		:user_2
	) .

:user_1
	a :user ;
	:id 1 ;
	:name "jane" .

:user_2
	a :user ;
	:id 2 ;
	:name "bob" .


:organization_2
	a :organization ;
	:id 2 ;
	:name "inc" ;
	:user (
		:user_3
		:user_4
	) .

:user_3
	a :user ;
	:id 3 ;
	:name "mary" .

:user_4
	a :user ;
	:id 4 ;
	:name "joe" .