Clarify async scenarios and deadlocks

dotnet-desktop-guide/winforms/controls/snippets/how-to-make-thread-safe-calls/cs/FormBackgroundWorker.cs

@@ -8,37 +8,36 @@
 using System.Threading.Tasks;
 using System.Windows.Forms;
 
-namespace project
+namespace project;
+
+public partial class FormBackgroundWorker : Form
 {
-    public partial class FormBackgroundWorker : Form
+    public FormBackgroundWorker()
     {
-        public FormBackgroundWorker()
-        {
-            InitializeComponent();
-        }
+        InitializeComponent();
+    }
 
-        //<Background>
-        private void button1_Click(object sender, EventArgs e)
-        {
-            if (!backgroundWorker1.IsBusy)
-                backgroundWorker1.RunWorkerAsync();
-        }
+    //<Background>
+    private void button1_Click(object sender, EventArgs e)
+    {
+        if (!backgroundWorker1.IsBusy)
+            backgroundWorker1.RunWorkerAsync(); // Not awaitable
+    }
 
-        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
-        {
-            int counter = 0;
-            int max = 10;
+    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
+    {
+        int counter = 0;
+        int max = 10;
 
-            while (counter <= max)
-            {
-                backgroundWorker1.ReportProgress(0, counter.ToString());
-                System.Threading.Thread.Sleep(1000);
-                counter++;
-            }
+        while (counter <= max)
+        {
+            backgroundWorker1.ReportProgress(0, counter.ToString());
+            System.Threading.Thread.Sleep(1000);
+            counter++;
         }
-
-        private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e) =>
-            textBox1.Text = (string)e.UserState;
-        //</Background>
     }
+
+    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e) =>
+        textBox1.Text = (string)e.UserState;
+    //</Background>
 }