/// <summary>
        /// Creates the DNN user control dictionary.
        /// </summary>
        /// <param name="sourceFiles">The source files.</param>
        private void CreateDnnUserControlDictionary(ITaskItem[] sourceFiles)
        {
            var desktopModuleFolder = string.Format(@"\{0}\", DnnGlobals.DnnDesktopModuleFolder);
            var userControlBaseClassPattern = new Regex(@"\s(?i)inherits(?-i)=""[a-zA-Z0-9\.]+""\s", RegexOptions.IgnoreCase);

            this.UserControls = new Dictionary<string, string>();
            sourceFiles.ForEach(
                item =>
                    {
                        if (item.ItemSpec.EndsWith(DnnGlobals.UserControlFileExtension, StringComparison.InvariantCultureIgnoreCase))
                        {
                            // Only for user controls...
                            using (var reader = new StreamReader(item.ItemSpec))
                            {
                                // TODO: optimize. Only read until found <> or EOF.
                                var content = reader.ReadToEnd();

                                var match = userControlBaseClassPattern.Match(content);
                                if (match.Success)
                                {
                                    // We know that the match.Value includes a '=' character, because it is part of the Regular Expression.
                                    var baseClass = match.Value.Split('=')
                                                         .Last()
                                                         .Trim(new[] { ' ', '"' });

                                    var startOfDesktopModuleFolder = item.ItemSpec.IndexOf(desktopModuleFolder);
                                    var relativeUserControlPath = item.ItemSpec.Substring(startOfDesktopModuleFolder + 1) // Add 1 so the first backslash won't be included.
                                                                      .Replace(@"\", @"/"); // Replace the backslashes by forward slashes in line with relative URIs.
                                    this.UserControls.Add(baseClass, relativeUserControlPath);
                                }
                            }
                        }
                    });
        }