C#

[Browsable(true)]
[Category("BrowserForm")]
[EditorAttribute(typeof(DisplayColumnsEditor), typeof(UITypeEditor))]
public ListDictionary DisplayColumns
{
    get { return displaycolumns; }
    set { displaycolumns = value; }
}

using System;
using System.Drawing.Design;
using System.ComponentModel;
using System.Windows.Forms.Design;
using System.Collections.Specialized;
using System.Windows.Forms;
using System.Collections;

namespace mynamespace
{
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
    class DisplayColumnsEditor : UITypeEditor
    {
        public DisplayColumnsEditor()
        {
        }

        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.Modal;
        }

        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            IWindowsFormsEditorService edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));
            if (edSvc == null)
            {
                return null;
            }

            ListDictionary editval;
            
            
            if (value == null)
            {
                editval = new ListDictionary();
            } else 
            {
                editval = (ListDictionary)value;
            }
            
            
            using (DisplayColumnsEditorDialog form = new DisplayColumnsEditorDialog(editval))
            {
                if (edSvc.ShowDialog(form) == DialogResult.OK)
                {
                    context.OnComponentChanged();
                    return (object)form.Current;
                }
            }

            return value;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Windows.Forms;

namespace mynamespace
{
    [Serializable()]
    public class DisplayColumn : ISerializable
    {
        private string _name;
        private string _headertext;
        private string _datapropertyname;
        private int _width;

        public DisplayColumn()
        {
            this._name = "";
            this._datapropertyname = "";
            this._headertext = "";
            this._width = 100;
        }

        public DisplayColumn(string colname)
        {
            this._name = colname;
            this._datapropertyname = colname;
            this._headertext = colname;
            this._width = 100;
        }

        public string Name
        {
            get
            {
                return this._name;
            }
            set
            {
                this._name = value;
            }
        }

        public string HeaderText
        {
            get
            {
                return this._headertext;
            }
            set
            {
                this._headertext = value;
            }
        }

        public string DataPropertyName
        {
            get
            {
                return this._datapropertyname;
            }
            set
            {
                this._datapropertyname = value;
            }
        }

        public int Width
        {
            get
            {
                return this._width;
            }
            set
            {
                this._width = value;
            }
        }

        public DisplayColumn(SerializationInfo info, StreamingContext ctxt)
        {
            Name = (String)info.GetValue("Name", typeof(string));
            DataPropertyName = (String)info.GetValue("DataPropertyName", typeof(string));
            HeaderText = (String)info.GetValue("HeaderText", typeof(string));
            Width = (int)info.GetValue("Width", typeof(int));
        }

        public void GetObjectData(SerializationInfo info, StreamingContext ctxt)
        {
            info.AddValue("Name", Name);
            info.AddValue("DataPropertyName", DataPropertyName);
            info.AddValue("HeaderText", HeaderText);
            info.AddValue("Width", Width);
        }

    }
}

  <data name="DisplayColumns" mimetype="application/x-microsoft.net.object.binary.base64">
    <value>
        AAEAAAD/////AQAAAAAAAAAMAgAAAElTeXN0ZW0sIFZlcnNpb249Mi4wLjAuMCwgQ3VsdHVyZT1uZXV0
        cmFsLCBQdWJsaWNLZXlUb2tlbj1iNzdhNWM1NjE5MzRlMDg5BQEAAAAtU3lzdGVtLkNvbGxlY3Rpb25z
        LlNwZWNpYWxpemVkLkxpc3REaWN0aW9uYXJ5BAAAAARoZWFkB3ZlcnNpb24FY291bnQIY29tcGFyZXIE
        AAADPFN5c3RlbS5Db2xsZWN0aW9ucy5TcGVjaWFsaXplZC5MaXN0RGljdGlvbmFyeStEaWN0aW9uYXJ5
        Tm9kZQIAAAAICBxTeXN0ZW0uQ29sbGVjdGlvbnMuSUNvbXBhcmVyAgAAAAkDAAAABgAAAAMAAAAKDAQA
        AABHU09QUlZDb3JlLCBWZXJzaW9uPTEuMC4zODcyLjI1NTAwLCBDdWx0dXJlPW5ldXRyYWwsIFB1Ymxp
        Y0tleVRva2VuPW51bGwFAwAAADxTeXN0ZW0uQ29sbGVjdGlvbnMuU3BlY2lhbGl6ZWQuTGlzdERpY3Rp
        b25hcnkrRGljdGlvbmFyeU5vZGUDAAAAA2tleQV2YWx1ZQRuZXh0AgQEIlNsaW0uU09QUlYuU09QUlZD
        b3JlLkRpc3BsYXlDb2x1bW4EAAAAPFN5c3RlbS5Db2xsZWN0aW9ucy5TcGVjaWFsaXplZC5MaXN0RGlj
        dGlvbmFyeStEaWN0aW9uYXJ5Tm9kZQIAAAACAAAABgUAAAAFR2NfSUQJBgAAAAkHAAAABQYAAAAiU2xp
        bS5TT1BSVi5TT1BSVkNvcmUuRGlzcGxheUNvbHVtbgQAAAAETmFtZRBEYXRhUHJvcGVydHlOYW1lCkhl
        YWRlclRleHQFV2lkdGgBAQEACAQAAAAJBQAAAAYJAAAAC2RhdGExMDBrX2lkBgoAAAACSURkAAAAAQcA
        AAADAAAABgsAAAAHR2NfVEVYVAkMAAAACQ0AAAABDAAAAAYAAAAJCwAAAAYPAAAABXRleHQxBhAAAAAE
        VEVYVGQAAAABDQAAAAMAAAAGEQAAAAhHY19DSVNMTwkSAAAACgESAAAABgAAAAkRAAAABhQAAAAFY2lz
        bG8GFQAAAAfEjMOtc2xvZAAAAAs=
</value>
  </data>

this.DisplayColumns = ((System.Collections.Specialized.ListDictionary)(resources.GetObject("$this.DisplayColumns")));

this.DisplayColumns = ((System.Collections.Specialized.ListDictionary)(resources.GetObject("DisplayColumns")));

EditSubCategory E = new EditSubCategory();

    SubCategory C = GlobalContextManager.Instance.Cache.GetSubCategory((int)R.Cells[0].Value);
    Category CC = GlobalContextManager.Instance.Cache.GetCategory(C.CategoryId);

  string strAverageDensity = Convert.ToString(GlobalContextManager.Instance.Conversions.ConvertMetricWeightToDefault(C.AverageDensity));

    E.ParentCategory = CC;
    E.Category = C.Name;
    E.IsActivated = C.IsEnabled;
    E.OriginalCategory = C.Name;

    strAverageDensity = string.Format("{0:0.00}", strAverageDensity);
    E.AverageDensity = strAverageDensity;

<br />
mailObj = new SmtpClient("smtp. MyCompany.com", 25);<br />
from = new MailAddress("xxxxxx@MyCompany.com", "Chris H");<br />
AuthInfo = new NetworkCredential(from.Address, "xxxxxxxxxxx");<br />
to = new MailAddress("xxxxxxxx@hotmail.com", "Chris H");<br />
MailMessage mail = new MailMessage(from, to);<br />
mail.Subject = "Testing";<br />
mail.Body = "Hello Everybody";<br />
<br />
mailObj.UseDefaultCredentials = false;<br />
mailObj.EnableSsl = true;<br />
mailObj.Credentials = AuthInfo;<br />
mailObj.Send(mail);<br />