Теперь кнопка Start/Pause может приостановить поток и запустить обратно. Добавлен resumeTask в TaskController для работы кнопки.

fileFinder/MainForm.cs

@@ -85,7 +85,6 @@ namespace fileFinder
                 {
                     MessageBox.Show(ex.Message, "Ошибка поиска внутри файла!");
                 }
-
                 _report.progress = counter;
                 _report.currentFileUrl = item;
                 report.Report(_report);
@@ -128,11 +127,21 @@ namespace fileFinder
 
         private async void handleSearchBtn_Click(object sender, EventArgs e)
         {
-            Progress<ProgressReportModel> progress = new Progress<ProgressReportModel>();
-            progress.ProgressChanged += reportProgress;
-            TreeNode tN = await Task.Run(() => buildResultTree(mainController, progress));
-            resultViewer.Nodes.Clear();
-            resultViewer.Nodes.Add(tN);
+            if (mainController.isStopped)
+            {
+                mainController.beginTask();
+                Progress<ProgressReportModel> progress = new Progress<ProgressReportModel>();
+                progress.ProgressChanged += reportProgress;
+                TreeNode tN = await Task.Run(() => buildResultTree(mainController, progress));
+                resultViewer.Nodes.Clear();
+                resultViewer.Nodes.Add(tN);
+            } else if (mainController.isPaused)
+            {
+                mainController.resumeTask();
+            } else
+            {
+                mainController.pauseTask();
+            }
         }
 
         public async Task fillChildNode (TreeNode node, String item)

fileFinder/TaskController.cs

@@ -9,17 +9,24 @@ namespace fileFinder
     class TaskController
     {
         public bool isPaused { get; private set; }
-        public bool isFinished { get; private set; }
+        public bool isStopped { get; private set; }
 
         public TaskController ()
         {
             isPaused = false;
-            isFinished = false;
+            isStopped = true;
         }
 
-        public bool pauseTask()
+        public bool beginTask ()
         {
-            if (!isPaused && !isFinished)
+            isPaused = false;
+            isStopped = false;
+            return true;
+        }
+
+        public bool pauseTask ()
+        {
+            if (!isPaused && !isStopped)
             {
                 isPaused = true;
                 return true;
@@ -29,7 +36,7 @@ namespace fileFinder
         
         public bool resumeTask ()
         {
-            if (isPaused && !isFinished)
+            if (isPaused && !isStopped)
             {
                 isPaused = false;
                 return true;
@@ -39,9 +46,9 @@ namespace fileFinder
 
         public bool stopTask ()
         {
-            if (!isFinished)
+            if (!isStopped)
             {
-                isFinished = true;
+                isStopped = true;
                 return true;
             } else
                 return false;