Support for killing synchronizers.

Wino.Core.Domain/Interfaces/IBaseSynchronizer.cs

@@ -23,12 +23,6 @@ namespace Wino.Core.Domain.Interfaces
         /// <param name="request">Request to queue.</param>
         void QueueRequest(IRequestBase request);
 
-        /// <summary>
-        /// TODO
-        /// </summary>
-        /// <returns>Whether active synchronization is stopped or not.</returns>
-        bool CancelActiveSynchronization();
-
         /// <summary>
         /// Synchronizes profile information with the server.
         /// Sender name and Profile picture are updated.

Wino.Core.Domain/Interfaces/ISynchronizerFactory.cs

@@ -7,5 +7,6 @@ namespace Wino.Core.Domain.Interfaces
     {
         Task<IWinoSynchronizerBase> GetAccountSynchronizerAsync(Guid accountId);
         Task InitializeAsync();
+        Task DeleteSynchronizerAsync(Guid accountId);
     }
 }

Wino.Core.Domain/Interfaces/IWinoSynchronizerBase.cs

@@ -28,5 +28,12 @@ namespace Wino.Core.Domain.Interfaces
         /// <param name="transferProgress">Optional progress reporting for download operation.</param>
         /// <param name="cancellationToken">Cancellation token.</param>
         Task DownloadMissingMimeMessageAsync(IMailItem mailItem, ITransferProgress transferProgress, CancellationToken cancellationToken = default);
+
+        /// <summary>
+        /// 1. Cancel active synchronization.
+        /// 2. Stop all running tasks.
+        /// 3. Dispose all resources.
+        /// </summary>
+        Task KillSynchronizerAsync();
     }
 }