diff --git a/AIParkingApplication/Statistic.cs b/AIParkingApplication/Statistic.cs
index ffaac09..7c2a752 100644
--- a/AIParkingApplication/Statistic.cs
+++ b/AIParkingApplication/Statistic.cs
@@ -14,6 +14,7 @@ namespace AIParkingApplication
     public partial class Statistic : UserControl
     {
         private const string AIPARKING_CLIENT_HTTP_API_REQUEST = "http://{0}:{1}{2}";
+        private readonly HttpClient client = new HttpClient { BaseAddress = new Uri("http://192.168.1.123:80/"), Timeout = TimeSpan.FromMilliseconds(5000) };
 
         Label lblLoaiXe;
         Label lblXeMay;
@@ -43,28 +44,26 @@ namespace AIParkingApplication
         {
             try
             {
-                using (var client = new HttpClient { BaseAddress = new Uri("http://192.168.1.123:80/"), Timeout = TimeSpan.FromMilliseconds(5000) })
+                HttpResponseMessage response = await client.GetAsync("/api/statistics");
+                response.EnsureSuccessStatusCode();
+                var vehicle = await response.Content.ReadAsAsync<Vehicle>();
+                lblSoLuongXeMay?.Invoke(new Action(() =>
                 {
-                    HttpResponseMessage response = await client.GetAsync("/api/statistics");
-                    response.EnsureSuccessStatusCode();
-                    var vehicle = await response.Content.ReadAsAsync<Vehicle>();
-                    lblSoLuongXeMay?.Invoke(new Action(() =>
-                    {
-                        lblSoLuongXeMay.Text = vehicle.NumberOfMoto.ToString();
-                    }));
-                    lblSoLuongOto?.Invoke(new Action(() =>
-                    {
-                        lblSoLuongOto.Text = vehicle.NumberOfCar.ToString();
-                    }));
-                    lblVehicleTotalIn?.Invoke(new Action(() =>
-                    {
-                        lblVehicleTotalIn.Text = vehicle.TotalIn;
-                    }));
-                    lblVehicleTotalOut?.Invoke(new Action(() =>
-                    {
-                        lblVehicleTotalOut.Text = vehicle.TotelOut;
-                    }));
-                }
+                    lblSoLuongXeMay.Text = vehicle.NumberOfMoto.ToString();
+                }));
+                lblSoLuongOto?.Invoke(new Action(() =>
+                {
+                    lblSoLuongOto.Text = vehicle.NumberOfCar.ToString();
+                }));
+                lblVehicleTotalIn?.Invoke(new Action(() =>
+                {
+                    lblVehicleTotalIn.Text = vehicle.TotalIn;
+                }));
+                lblVehicleTotalOut?.Invoke(new Action(() =>
+                {
+                    lblVehicleTotalOut.Text = vehicle.TotelOut;
+                }));
+
             }
             catch (Exception ex)
             {
@@ -102,7 +101,7 @@ namespace AIParkingApplication
 
             [JsonProperty("moto")]
             public int NumberOfMoto { get; set; }
-            
+
             [JsonProperty("total_in")]
             public string TotalIn { get; set; }