From 29e6599ae5ce654d997375d5e94a276b66db68d9 Mon Sep 17 00:00:00 2001
From: Daniel Collingwood <82693586+danzuep@users.noreply.github.com>
Date: Mon, 23 Oct 2023 12:31:59 +0800
Subject: [PATCH] changed from switch expression to .NET standard2.0 compatible
 switch-case

---
 .../Services/ImapReceiver.cs                  |  2 +-
 .../Services/MailFolderClient.cs              | 22 ++++++++++++++-----
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/source/MailKitSimplified.Receiver/Services/ImapReceiver.cs b/source/MailKitSimplified.Receiver/Services/ImapReceiver.cs
index ab0e3b7..78095e4 100644
--- a/source/MailKitSimplified.Receiver/Services/ImapReceiver.cs
+++ b/source/MailKitSimplified.Receiver/Services/ImapReceiver.cs
@@ -324,7 +324,7 @@ public async Task<IList<string>> GetMailFolderNamesAsync(CancellationToken cance
         public async Task<UniqueId?> MoveToSentAsync(IMessageSummary messageSummary, CancellationToken cancellationToken = default)
         {
             using (var mailFolderClient = _mailFolderClient.Value)
-                return await mailFolderClient.MoveOrCopyAsync(messageSummary.UniqueId, messageSummary.Folder, mailFolderClient.SentFolder.Value, move: true, cancellationToken).ConfigureAwait(false);
+                return await mailFolderClient.MoveOrCopyAsync(messageSummary.UniqueId, messageSummary.Folder, mailFolderClient.SentFolder, move: true, cancellationToken).ConfigureAwait(false);
         }
 
         public IImapReceiver Clone()
diff --git a/source/MailKitSimplified.Receiver/Services/MailFolderClient.cs b/source/MailKitSimplified.Receiver/Services/MailFolderClient.cs
index 140dcd5..aaebad4 100644
--- a/source/MailKitSimplified.Receiver/Services/MailFolderClient.cs
+++ b/source/MailKitSimplified.Receiver/Services/MailFolderClient.cs
@@ -181,14 +181,24 @@ public async Task<int> DeleteMessagesAsync(TimeSpan relativeOffset, SearchQuery
 
         private IEnumerable<string> GetFolderNames(SpecialFolder specialFolder)
         {
-            var folderNames = specialFolder switch
+            IList<string> folderNames;
+            switch (specialFolder)
             {
-                SpecialFolder.Sent => SentFolderNames,
-                SpecialFolder.Drafts => DraftsFolderNames,
-                SpecialFolder.Junk => JunkFolderNames,
-                SpecialFolder.Trash => TrashFolderNames,
+                case SpecialFolder.Sent:
+                    folderNames = SentFolderNames;
+                    break;
+                case SpecialFolder.Drafts:
+                    folderNames = DraftsFolderNames;
+                    break;
+                case SpecialFolder.Junk:
+                    folderNames = JunkFolderNames;
+                    break;
+                case SpecialFolder.Trash:
+                    folderNames = TrashFolderNames;
+                    break;
                 // All, Archive, Flagged, Important
-                _ => throw new NotImplementedException()
+                default:
+                    throw new NotImplementedException();
             };
             return folderNames;
         }