using singleton to pass property values? [closed]
public class ShareArray
{
    private System.Collections.ArrayList arrayList;
    private string pass;
    private string userName

    #region Property
    public System.Collections.ArrayList ArrayList { get{return  arrayList;}}
    public string UserName { get{return  userName;} set{userName = value;}}
    public string Pass { get{return  pass;} set{pass = value;}}
    #endregion

    #region Imp. signletone
    private static ShareArray instance;
    public static ShareArray Instance
    {
        get
        {
            if (instance == null)
            {
                instance = new ShareArray();
            }
            return instance;
        }
    }


    private ShareArray()
    {
        arrayList = new System.Collections.ArrayList();
    }
    #endregion
}

ShareArray.Instance.Pass = "pass";
ShareArray.Instance.UserName = "user name";

namespace SingletonExample
{
    public seal class Singleton
    {
        private static Singleton _instance;
        private static object _syncInstance = new Object();
        private static ArrayList _someList = new ArrayList();

        private static Singleton GetInstance()
        {
            get
            {
                if (_instance == null)
                {
                    lock(_syncInstance)
                    {
                         _instance = new Singleton();
                    }
                }
                return _instance;
            }
        }

        public ArrayList ArrayList
        {
            get
            {
                return _someList;
            }
            set
            {
                _someList = value;
            }
        }

        public Object GetValue
        {
            get
            {
                return _someList[value];
            }
        }
    }

}