Get User Email from Active Directory

	public String GetUserEmail(string UserName)
	{
	try
	{
	string strpath = _LdapPath;
	DirectoryEntry ou = new DirectoryEntry(strpath, _AdminUserName, _AdminPassword);
	DirectorySearcher ds = new DirectorySearcher(ou);
	String[] strArray = UserName.Split('\\');
	if (strArray.Length > 1)
	UserName = strArray[1];
	string filter = string.Format("(&(ObjectClass={0})(sAMAccountName={1}))", "User", UserName);
	ds.Filter = filter;
	SearchResult result = ds.FindOne();
	DirectoryEntry directoryEntry = result.GetDirectoryEntry();
	if (directoryEntry.Properties["mail"] != null)
	return Convert.ToString(directoryEntry.Properties["mail"].Value);
	return "";
	}
	catch (Exception ex)
	{
	LogErrors(ex, "GetUserEmail");
	return null;
	}
	}

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