UploadNewVersionUsingSessionAsync always throws InvalidCastException and creates multiple new versions

• I have checked that the SDK documentation doesn’t solve my issue.
• I have checked that the API documentation doesn’t solve my issue.
• I have searched the Box Developer Forums and my issue isn’t already reported (or if it has been reported, I have attached a link to it, for reference).
• I have searched Issues in this repo and my issue isn’t already reported.

Description of the Issue

Every call of BoxClient.FilesManager.UploadNewVersionUsingSessionAsync throws System.InvalidCastException. Also, multiple new versions appear in Box after only one call of this method.

Steps to Reproduce

1. Upload a new ~20 MB file using BoxClient.FilesManager.UploadUsingSessionAsync. Result: A new file is uploaded to Box.
2. Upload a new ~20 MB version of the same file using BoxClient.FilesManager.UploadNewVersionUsingSessionAsync. Result: In Box there are now 6 new versions of the same file and a System.InvalidCastException is thrown.

Expected Behavior

Only one new version is uploaded without throwing an exception.

Error Message, Including Stack Trace

System.InvalidCastException: Unable to cast object of type 'Box.V2.Models.BoxEntity' to type 'Box.V2.Models.BoxFile'.
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonConverter[] converters)
   at Box.V2.Converter.BoxJsonConverter.Parse[T](String content)
   at Box.V2.Extensions.BoxResponseExtensions.ParseResults[T](IBoxResponse`1 response, IBoxConverter converter)
   at Box.V2.Managers.BoxResourceManager.<ToResponseAsync>d__11`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Box.V2.Managers.BoxFilesManager.<CommitFileVersionSessionAsync>d__13.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Box.V2.Managers.BoxFilesManager.<>c__DisplayClass19_0.<<UploadSessionAsync>b__2>d.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Box.V2.Utility.Retry.<ExecuteAsync>d__3`1.MoveNext()
   --- End of inner exception stack trace ---
   at Box.V2.Utility.Retry.<ExecuteAsync>d__3`1.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Box.V2.Managers.BoxFilesManager.<UploadSessionAsync>d__19.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Box.V2.Managers.BoxFilesManager.<UploadNewVersionUsingSessionAsync>d__17.MoveNext()

Screenshots

File in Box before call of UploadNewVersionUsingSessionAsync:

File in Box after one call of UploadNewVersionUsingSessionAsync:

Versions Used

.Net SDK: 3.24.0 Newtonsoft.Json: 12.0.3 Windows: Server 2012 R2 / Windows 10 2004

[mwwoda]

Hi all. Sorry for such a late reply. The fix is already in the main branch and will be shipped with the next package release.

[WolfieBlin]

Experiencing the same issue in all versions from 3.23 to 4.1. I am now forced to use version 3.22. I would really appreciate if some of the developers check it and fixed it since this bug is open from Nov 24, 2020.