diff --git a/.vs/SubCabinetSolution/v17/.suo b/.vs/SubCabinetSolution/v17/.suo
index 5f8c4d6..07f4ce6 100644
--- a/.vs/SubCabinetSolution/v17/.suo
+++ b/.vs/SubCabinetSolution/v17/.suo
Binary files differ

diff --git a/.vs/SubCabinetSolution/v17/.suo b/.vs/SubCabinetSolution/v17/.suo
index 5f8c4d6..07f4ce6 100644
--- a/.vs/SubCabinetSolution/v17/.suo
+++ b/.vs/SubCabinetSolution/v17/.suo
Binary files differ
diff --git a/SubCabinetSolution/Utils/DataBaseManager.cs b/SubCabinetSolution/Utils/DataBaseManager.cs
index 7040ae6..d9311f1 100644
--- a/SubCabinetSolution/Utils/DataBaseManager.cs
+++ b/SubCabinetSolution/Utils/DataBaseManager.cs
@@ -1,14 +1,16 @@
-using MySql.Data.MySqlClient;
+using System;
+using MySql.Data.MySqlClient;
 
 namespace SubCabinetSolution.Utils
 {
     public class DataBaseManager
     {
-        private static DataBaseManager _dataBase;
+        private static readonly Lazy<DataBaseManager> Lazy = new Lazy<DataBaseManager>(() => new DataBaseManager());
 
-        public static DataBaseManager GetInstance()
+        public static DataBaseManager Instance => Lazy.Value;
+
+        private DataBaseManager()
         {
-            return _dataBase ?? (_dataBase = new DataBaseManager());
         }
 
         public MySqlConnection GetConnection()

diff --git a/.vs/SubCabinetSolution/v17/.suo b/.vs/SubCabinetSolution/v17/.suo
index 5f8c4d6..07f4ce6 100644
--- a/.vs/SubCabinetSolution/v17/.suo
+++ b/.vs/SubCabinetSolution/v17/.suo
Binary files differ
diff --git a/SubCabinetSolution/Utils/DataBaseManager.cs b/SubCabinetSolution/Utils/DataBaseManager.cs
index 7040ae6..d9311f1 100644
--- a/SubCabinetSolution/Utils/DataBaseManager.cs
+++ b/SubCabinetSolution/Utils/DataBaseManager.cs
@@ -1,14 +1,16 @@
-using MySql.Data.MySqlClient;
+using System;
+using MySql.Data.MySqlClient;
 
 namespace SubCabinetSolution.Utils
 {
     public class DataBaseManager
     {
-        private static DataBaseManager _dataBase;
+        private static readonly Lazy<DataBaseManager> Lazy = new Lazy<DataBaseManager>(() => new DataBaseManager());
 
-        public static DataBaseManager GetInstance()
+        public static DataBaseManager Instance => Lazy.Value;
+
+        private DataBaseManager()
         {
-            return _dataBase ?? (_dataBase = new DataBaseManager());
         }
 
         public MySqlConnection GetConnection()
diff --git a/SubCabinetSolution/ViewModel/MainViewModel.cs b/SubCabinetSolution/ViewModel/MainViewModel.cs
index 78eea5a..84127f5 100644
--- a/SubCabinetSolution/ViewModel/MainViewModel.cs
+++ b/SubCabinetSolution/ViewModel/MainViewModel.cs
@@ -95,7 +95,7 @@
                 MessageBox.Show("No video sources found", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
             }
 
-            _connection = DataBaseManager.GetInstance().GetConnection();
+            _connection = DataBaseManager.Instance.GetConnection();
             LoginToMainCommand = new RelayCommand(Login);
             OpenCameraCommand = new RelayCommand<MainWindow>(OpenCamera);
             VersionName = "版本号 Ver " + Application.ResourceAssembly.GetName().Version;