Out of memory exception when dowloading file (DevExpress Filemanager)

I am using DevExpress and on the server side I have the following:

var fileStreamResult = FileManagerExtension.DownloadFiles(settings, provider, FileManagerFileDownloadingEventHandler);

Where the provider is an AzureProvider. The settings are:

settings.SettingsEditing.AllowDownload = true;
settings.Settings.AllowedFileExtensions = new[] {".avi", ".mov"};

Now if I download a file that is ~30 MB, it works fine but when I try it with a file that is 200 MB, then .DownloadFiles returns null.

Also when I look at the first chance exceptions I see:

System.OutOfMemoryException: Exception of type 'System.OutOfMemoryException' was thrown.at System.IO.MemoryStream.set_Capacity(Int32 value)

I don't know what the problem is but I have also set the following in my config file:

  <requestFiltering>
    <requestLimits maxAllowedContentLength="30000000" />
  </requestFiltering>

I played with the above value adding extra zeros but, still no luck.

Anyone has any ideas? thanks.

Edit: please note that the upload of 200MB is fine. The problem occurs during downloading

Solution

Thanks to DevExpress support, they highlighted it was because IIS Express runs out of memory, as it is possibly being run as a 32-bit process. So changing Visual Studio to use the 64-bit did the trick. Hopefully this helps someone in the future:

How to change Visual Studio option to use the 64-bit version of IIS Express