如何在没有System.UnauthorizedAccessException的情况下将文件从应用程序捆绑包复制到另一个目录？

Question

I try to copy a file that is included in the app bundle as a resource to the temp folder on the iPhone. While this works on the Simulator, on the device I get an exception:

System.UnauthorizedAccessException: Access to the path "/private/var/mobile/Applications/B763C127-9882-4F76-8860-204AFEA8DD68/Client_iOS.app/testbundle.zip" is denied.

The code I use is below It cannot open the source file.

using(var sourceStream = File.Open("./demobundle.zip", FileMode.Open))
{
    sourceStream.CopyTo(targetStream);
}   

What is the correct way of copying a file into a destination stream?

Answer 1

Why is it that I always find the answers to my questions practically immediately after I asked here? :-)

One has to specify the file access mode. If it is set to Read , it'll work. The default seems to be some write mode and that is obviously not possible.

using(var sourceStream = File.Open("./demobundle.zip", FileMode.Open, FileAccess.Read))
{
    sourceStream.CopyTo(targetStream);
}