Solution - Add and used Logger.

WatchList.Core/Logger/ConsoleLogger.cs

@@ -0,0 +1,35 @@
+using Microsoft.Extensions.Logging;
+
+namespace WatchList.Core.Logger
+{
+    public sealed class ConsoleLogger : ILogger
+    {
+        private LogLevel _logLevel;
+
+        public ConsoleLogger(LogLevel logLevel) => _logLevel = logLevel;
+
+        public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)
+        {
+            if (!IsEnabled(logLevel))
+            {
+                return;
+            }
+
+            var message = formatter(state, exception);
+            Console.WriteLine("[{0} {1:G}] {2}", logLevel, DateTime.Now, message);
+        }
+
+        public bool IsEnabled(LogLevel logLevel) => _logLevel <= logLevel;
+
+        public IDisposable? BeginScope<TState>(TState state)
+            where TState : notnull
+            => new Disposable();
+
+        private sealed class Disposable : IDisposable
+        {
+            public void Dispose()
+            {
+            }
+        }
+    }
+}

WatchList.Core/Logger/FileLogger.cs

@@ -0,0 +1,48 @@
+using System.Globalization;
+using Microsoft.Extensions.Logging;
+
+namespace WatchList.Core.Logger
+{
+    public class FileLogger : ILogger
+    {
+        private LogLevel _logLevel;
+        private readonly string _pathFileLog;
+
+        public FileLogger(LogLevel logLevel, string pathFileLog)
+        {
+            _logLevel = logLevel;
+            _pathFileLog = pathFileLog;
+        }
+
+        public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)
+        {
+            if (!IsEnabled(logLevel))
+            {
+                return;
+            }
+
+            var message = formatter(state, exception);
+            var logText = string.Format("[{0} {1:G}] {2}", logLevel, DateTime.Now, message);
+            File.AppendAllText(BuildPath(), logText + Environment.NewLine);
+        }
+
+        public bool IsEnabled(LogLevel logLevel) => _logLevel <= logLevel;
+
+        public IDisposable? BeginScope<TState>(TState state)
+            where TState : notnull
+            => new Disposable();
+
+        private sealed class Disposable : IDisposable
+        {
+            public void Dispose()
+            {
+            }
+        }
+
+        private string BuildPath()
+        {
+            var dateStr = DateTime.Now.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture);
+            return Path.Combine(_pathFileLog, dateStr + ".txt");
+        }
+    }
+}

WatchList.Core/Repository/WatchItemRepository.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
 using WatchList.Core.Model.ItemCinema;
 using WatchList.Core.PageItem;
 using WatchList.Core.Repository.Db;
@@ -9,8 +10,13 @@ namespace WatchList.Core.Repository
     public class WatchItemRepository : IWatchItemRepository
     {
         private readonly WatchCinemaDbContext _db;
+        private readonly ILogger _logger;
 
-        public WatchItemRepository(WatchCinemaDbContext db) => _db = db;
+        public WatchItemRepository(WatchCinemaDbContext db, ILogger logger)
+        {
+            _db = db;
+            _logger = logger;
+        }
 
         public PagedList<WatchItem> GetPage(WatchItemSearchRequest searchRequest)
         {
@@ -24,6 +30,7 @@ public void Add(WatchItem item)
             item.Id = _db.ReplaceIdIsNotFree(item);
             _db.Add(item);
             _db.SaveChanges();
+            _logger.LogInformation("Add item with ID {0}", item.Id);
         }
 
         public void Remove(Guid id)
@@ -33,6 +40,8 @@ public void Remove(Guid id)
             {
                 throw new InvalidOperationException("Interaction element not found.");
             }
+
+            _logger.LogInformation("Remove item with ID {0}", id);
         }
 
         public void Update(WatchItem editItem)
@@ -52,6 +61,8 @@ public void Update(WatchItem editItem)
             item.Status = editItem.Status;
 
             _db.SaveChanges();
+
+            _logger.LogInformation("Edit item with ID {0}", item.Id);
         }
 
         public List<Guid> SelectDuplicateItems(WatchItem item) =>

WatchList.Core/Service/DataLoading/DownloadDataService.cs

@@ -1,3 +1,4 @@
+using Microsoft.Extensions.Logging;
 using WatchList.Core.Model.Filter;
 using WatchList.Core.Model.QuestionResult;
 using WatchList.Core.Model.Sorting;
@@ -11,13 +12,14 @@ namespace WatchList.Core.Service.DataLoading
     public class DownloadDataService
     {
         private readonly WatchItemRepository _repository;
-
         private readonly IMessageBox _messageBox;
+        private readonly ILogger _logger;
 
-        public DownloadDataService(WatchItemRepository repository, IMessageBox messageBox, int numberOfItemPerPage = 500)
+        public DownloadDataService(WatchItemRepository repository, IMessageBox messageBox, ILogger logger, int numberOfItemPerPage = 500)
         {
             _repository = repository;
             _messageBox = messageBox;
+            _logger = logger;
             NumberOfItemPerPage = numberOfItemPerPage;
         }
 
@@ -33,6 +35,7 @@ public void Download(WatchItemRepository repository, ILoadRule loadRule)
                 var watchItemCollection = new WatchItemCollection(pagedList);
                 watchItemCollection = loadRule.Apply(watchItemCollection);
 
+                _logger.LogInformation("Load items according to selected rules");
                 AddItems(watchItemCollection);
                 UpdateItems(watchItemCollection);
 

WatchList.Core/WatchList.Core.csproj

@@ -11,6 +11,7 @@
     <PackageReference Include="Ardalis.SmartEnum.SystemTextJson" Version="2.1.0" />
     <PackageReference Include="CassandraCSharpDriver" Version="3.18.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.7" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.1" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

WatchList.WinForms/BoxCinemaForm.cs

@@ -1,5 +1,6 @@
 using MaterialSkin.Controls;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
 using WatchList.Core.Model.Filter.Components;
 using WatchList.Core.Model.ItemCinema;
 using WatchList.Core.Model.ItemCinema.Components;
@@ -36,6 +37,7 @@ public partial class BoxCinemaForm : MaterialForm
         private readonly WatchItemService _itemService;
         private readonly IMessageBox _messageBox;
         private readonly WatchItemRepository _itemRepository;
+        private readonly ILogger _logger;
 
         private WatchItemSearchRequest _searchRequest = new WatchItemSearchRequest();
 
@@ -48,8 +50,8 @@ public BoxCinemaForm(IServiceProvider serviceProvider)
             _itemRepository = serviceProvider.GetRequiredService<WatchItemRepository>();
             _messageBox = serviceProvider.GetRequiredService<IMessageBox>();
             _itemService = serviceProvider.GetRequiredService<WatchItemService>();
+            _logger = serviceProvider.GetRequiredService<ILogger>();
             _pagedList = _itemService.GetPage(_searchRequest);
-
             Load += BoxCinemaForm_Load;
         }
 
@@ -95,6 +97,7 @@ private void BtnAddCinema_Click(object sender, EventArgs e)
                 return;
             }
 
+            _logger.LogInformation("Click save add item");
             var itemCinema = addForm.GetCinema();
             _itemService.Add(itemCinema.ToWatchItem());
 
@@ -114,6 +117,7 @@ private void BtnEditRow_Click(object sender, EventArgs e)
                     return;
                 }
 
+                _logger.LogInformation("Click save edit item");
                 var updateItem = updateForm.GetEditItemCinema();
                 _itemService.Update(oldItem.ToWatchItem(), updateItem.ToWatchItem());
                 UpdateGridData();
@@ -141,6 +145,7 @@ private void BtnDeleteMovie_Click(object sender, EventArgs e)
                 return;
             }
 
+            _logger.LogInformation("Click delite item");
             foreach (var id in selectedRowIds)
             {
                 RemoveItemRowGrid(id);
@@ -164,6 +169,7 @@ private void BtnDownloadDataFile_Click(object sender, EventArgs e)
                 return;
             }
 
+            _logger.LogInformation("Add item from the selected file <{0}>", openReplaceDataFromFile.FileName);
             var dbContext = new FileDbContextFactory(openReplaceDataFromFile.FileName).Create();
             var loadRuleConfig = dataLoadingForm.GetLoadRuleConfig();
             var loadRuleHasGrade = new DeleteGradeRule(loadRuleConfig);
@@ -172,13 +178,18 @@ private void BtnDownloadDataFile_Click(object sender, EventArgs e)
             var loadDuplicateItem = new DuplicateLoadRule(_itemRepository, loadRuleConfig);
             var aggregateRules = new AggregateLoadRule { loadRuleHasGrade, loadRuleType, loadRuleMoreGrade, loadDuplicateItem };
 
-            var repositoryDataDownload = new WatchItemRepository(dbContext);
+            var repositoryDataDownload = new WatchItemRepository(dbContext, _logger);
 
             var downloadDataService = _serviceProvider.GetRequiredService<DownloadDataService>();
             downloadDataService.Download(repositoryDataDownload, aggregateRules);
             UpdateGridData();
         }
 
+        private void BoxCinemaForm_FormClosed(object sender, FormClosedEventArgs e)
+        {
+            _logger.LogInformation("Close App.");
+        }
+
         private void BtnBackPage_Click(object sender, EventArgs e)
         {
             if (_pagedList.HasPreviousPage)

WatchList.WinForms/Program.cs

@@ -1,5 +1,7 @@
 using MaterialSkin;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using WatchList.Core.Logger;
 using WatchList.Core.Repository;
 using WatchList.Core.Service;
 using WatchList.Core.Service.Component;
@@ -23,6 +25,9 @@ public static void Main()
             // see https://aka.ms/applicationconfiguration.
             ApplicationConfiguration.Initialize();
 
+            var path = "logs";
+            CreatDirectoryIfNotExists(path);
+
             var serviceCollection = new ServiceCollection()
                 .AddSingleton(new FileDbContextFactory("app.db"))
                 .AddScoped(e => e.GetRequiredService<FileDbContextFactory>().Create())
@@ -32,7 +37,9 @@ public static void Main()
                 .AddScoped<WatchItemService>()
                 .AddScoped<DownloadDataService>()
                 .AddTransient<MergeDatabaseForm>()
-                .AddTransient<BoxCinemaForm>();
+                .AddTransient<BoxCinemaForm>()
+                //.AddTransient<ILogger>(e => new ConsoleLogger(LogLevel.Information))
+                .AddTransient<ILogger>(e => new FileLogger(LogLevel.Trace, path));
 
             using var contain = serviceCollection.BuildServiceProvider(new ServiceProviderOptions
             {
@@ -50,7 +57,25 @@ public static void Main()
             materialSkinManager.Theme = MaterialSkinManager.Themes.LIGHT;
             materialSkinManager.ColorScheme = new ColorScheme(Primary.Purple900, Primary.DeepPurple700, Primary.Purple50, Accent.LightBlue200, TextShade.WHITE);
 
-            Application.Run(form);
+            var loger = scope.ServiceProvider.GetRequiredService<ILogger>();
+
+            try
+            {
+                loger.LogTrace("Launch the application");
+                Application.Run(form);
+            }
+            catch (Exception ex)
+            {
+                loger.LogError(ex, "Unhandled exception");
+            }
+        }
+
+        static void CreatDirectoryIfNotExists(string path)
+        {
+            if (!Directory.Exists(path))
+            {
+                Directory.CreateDirectory(path);
+            }
         }
     }
 }

WatchList.WinForms/WatchList.WinForms.csproj

@@ -15,6 +15,7 @@
     <PackageReference Include="Ardalis.SmartEnum.SystemTextJson" Version="2.1.0" />
     <PackageReference Include="MaterialSkin.2" Version="2.3.1" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="7.0.1" />
     <PackageReference Include="StyleCop.Analyzers" Version="1.1.118">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>