I want to get the email property from the group selected. These are distribution groups. How can I get that? Here is my code..

Code:
	private void Page_Load(object sender, System.EventArgs e)
		{
			DirectoryEntry de = new DirectoryEntry("LDAP://OU=Distribution Lists,DC=CRAB,DC=ORG");
			foreach(DirectoryEntry child in de.Children)
			{ 
				ddGroups.Items.Add(child.Name.ToString());
			}

		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.ddGroups.SelectedIndexChanged += new System.EventHandler(this.ddGroups_SelectedIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void ddGroups_SelectedIndexChanged(object sender, System.EventArgs e)
		{
			string grp = ddGroups.SelectedItem.Text;
			string grpLeft = grp.Substring(3);
			
			int i = 0;
			DirectoryEntry de = new DirectoryEntry("LDAP://OU=Distribution Lists,DC=CRAB,DC=ORG");
			DirectorySearcher srch = new DirectorySearcher("(CN=" + grpLeft + ")");
			SearchResultCollection coll = srch.FindAll();
			foreach (SearchResult rs in coll)
			{
				ResultPropertyCollection resultPropColl = rs.Properties;
				if(resultPropColl["member"] != null)
				{
					foreach( Object memberColl in resultPropColl["member"])
					{
						i = i + 1;
						DirectoryEntry gpMemberEntry = new DirectoryEntry("LDAP://" + memberColl);
						System.DirectoryServices.PropertyCollection userProps = gpMemberEntry.Properties;
						members = members + i + ". <a href=mailto:" + userProps["sAMAccountName"].Value + "@crab.org>" + userProps["displayName"].Value + "<br></a>";
						//Response.Write(userProps["sAMAccountName"].Value);
						//Response.Write("<br>");
						//					DirectoryEntry gpMemberEntry = new DirectoryEntry("LDAP://" + memberColl);
						//					System.DirectoryServices.PropertyCollection userProps = gpMemberEntry.Properties;
						//					object obVal = userProps["sAMAccountName"].Value;
						//					if (null != obVal)
						//					{
						//						groupMemebers.Add(obVal.ToString());
						//					}
					}
				}
				else
				{
					members = "<b>No users in this group.</b>";
				}
				}
				this.DataBind();				
			}

			}