code_style: make sure that all Stream objects will be disposed immediately after operation finished

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Commands/SaveRevisionFile.cs

@@ -16,7 +16,7 @@ public static async Task RunAsync(string repo, string revision, string file, str
             var isLFSFiltered = await new IsLFSFiltered(repo, revision, file).GetResultAsync().ConfigureAwait(false);
             if (isLFSFiltered)
             {
-                var pointerStream = await QueryFileContent.RunAsync(repo, revision, file).ConfigureAwait(false);
+                await using var pointerStream = await QueryFileContent.RunAsync(repo, revision, file).ConfigureAwait(false);
                 await ExecCmdAsync(repo, "lfs smudge", saveTo, pointerStream).ConfigureAwait(false);
             }
             else

src/ViewModels/CommitDetail.cs

@@ -694,7 +694,7 @@ private async Task SetViewingBlobAsync(Models.Object file)
                 return;
             }
 
-            var contentStream = await Commands.QueryFileContent.RunAsync(_repo.FullPath, _commit.SHA, file.Path);
+            await using var contentStream = await Commands.QueryFileContent.RunAsync(_repo.FullPath, _commit.SHA, file.Path);
             var content = await new StreamReader(contentStream).ReadToEndAsync();
             var lfs = Models.LFSObject.Parse(content);
             if (lfs != null)

src/ViewModels/FileHistories.cs

@@ -131,7 +131,7 @@ private async Task<object> GetRevisionFileContentAsync(Models.Object obj)
                     return new FileHistoriesRevisionFile(_file, binaryFile, true);
                 }
 
-                var contentStream = await Commands.QueryFileContent.RunAsync(_repo, _revision.SHA, _file).ConfigureAwait(false);
+                await using var contentStream = await Commands.QueryFileContent.RunAsync(_repo, _revision.SHA, _file).ConfigureAwait(false);
                 var content = await new StreamReader(contentStream).ReadToEndAsync();
                 var lfs = Models.LFSObject.Parse(content);
                 if (lfs != null)