diff --git a/AIParkingApplication/LoginForm.cs b/AIParkingApplication/LoginForm.cs
index 876a9b2..90ba906 100644
--- a/AIParkingApplication/LoginForm.cs
+++ b/AIParkingApplication/LoginForm.cs
@@ -18,7 +18,7 @@ namespace AIParkingApplication
             }
             txtUsername.Focus();
             lblLoginStatus.Text = string.Empty;
-            this.AcceptButton = btnLogin;
+            AcceptButton = btnLogin;
         }
 
         private async void Login()
@@ -77,12 +77,12 @@ namespace AIParkingApplication
             }
         }
 
-        private void btnLogin_Click(object sender, System.EventArgs e)
+        private void btnLogin_Click(object sender, EventArgs e)
         {
             Login();
         }
 
-        private void btnExit_Click(object sender, System.EventArgs e)
+        private void btnExit_Click(object sender, EventArgs e)
         {
             if (DialogResult.OK == MessageBox.Show("AIParking - Bạn muốn thoát ứng dụng?", "Cảnh báo!", MessageBoxButtons.OKCancel, MessageBoxIcon.Question))
             {