Unzipping throws an “The underlying compression routine could not be loaded correctly”

Question

Trying to unzip a file on Win10 mobile (UWP) with the following code

using (ZipArchive archive = new ZipArchive(stream, ZipArchiveMode.Read))
{
  ZipArchive         


        

Answer 1

According to the "project.lock.json" you've uploaded, I think the problem here may be related to the System.IO.Compression 4.3.0 package.

In the exception throwing project, you can find it uses "System.IO.Compression 4.3.0" like following:

"runtime.native.System.IO.Compression/4.3.0": {
  "type": "package",
  "dependencies": {
    "Microsoft.NETCore.Platforms": "1.1.0",
    "Microsoft.NETCore.Targets": "1.1.0"
  },
  "compile": {
    "lib/netstandard1.0/_._": {}
  },
  "runtime": {
    "lib/netstandard1.0/_._": {}
  }
},
...
"System.IO.Compression/4.3.0": {
  "type": "package",
  "dependencies": {
    "System.Buffers": "4.3.0",
    "System.Collections": "4.3.0",
    "System.Diagnostics.Debug": "4.3.0",
    "System.IO": "4.3.0",
    "System.Resources.ResourceManager": "4.3.0",
    "System.Runtime": "4.3.0",
    "System.Runtime.Extensions": "4.3.0",
    "System.Runtime.Handles": "4.3.0",
    "System.Runtime.InteropServices": "4.3.0",
    "System.Text.Encoding": "4.3.0",
    "System.Threading": "4.3.0",
    "System.Threading.Tasks": "4.3.0",
    "runtime.native.System.IO.Compression": "4.3.0"
  },
  ...

And in the working project, it uses "System.IO.Compression 4.1.1":

"runtime.native.System.IO.Compression/4.1.0": {
  "type": "package",
  "dependencies": {
    "Microsoft.NETCore.Platforms": "1.0.1",
    "Microsoft.NETCore.Targets": "1.0.1"
  },
  "compile": {
    "lib/netstandard1.0/_._": {}
  },
  "runtime": {
    "lib/netstandard1.0/_._": {}
  }
},
...
"System.IO.Compression/4.1.1": {
  "type": "package",
  "dependencies": {
    "System.Collections": "4.0.11",
    "System.Diagnostics.Debug": "4.0.11",
    "System.IO": "4.1.0",
    "System.Resources.ResourceManager": "4.0.1",
    "System.Runtime": "4.1.0",
    "System.Runtime.Extensions": "4.1.0",
    "System.Runtime.Handles": "4.0.1",
    "System.Runtime.InteropServices": "4.1.0",
    "System.Text.Encoding": "4.0.11",
    "System.Threading": "4.0.11",
    "System.Threading.Tasks": "4.0.11",
    "runtime.native.System.IO.Compression": "4.1.0"
  },
  ...

It seems that System.IO.Compression 4.3.0 package can't be used in UWP project for now. Currently the latest stable version of "Microsoft.NETCore.UniversalWindowsPlatform" package uses "System.IO.Compression 4.1.1" package. And you should be able to reproduce your issue with the working project by adding System.IO.Compression 4.3.0 package in it like following:

{
  "dependencies": {
    "Microsoft.NETCore.UniversalWindowsPlatform": "5.2.2",
    "System.IO.Compression": "4.3.0"
  },
  "frameworks": {
    "uap10.0": { }
  },
  "runtimes": {
    "win10-arm": { },
    "win10-arm-aot": { },
    "win10-x86": { },
    "win10-x86-aot": { },
    "win10-x64": { },
    "win10-x64-aot": { }
  }
}

So to fix this issue, I'd suggest you check the reference of your project and make sure there is no "System.IO.Compression 4.3.0" package. If you do need to use "System.IO.Compression" package, you can try to downgrade it to "4.1.1".

Answer 2

I found the root cause. As Jay Zuo said, the problem is that in the project.lock.json is somehow referencing the "System.IO.Compression 4.3.0".

I am not directly referencing it in any project.json file. I am indirectly referencing it by a .NETSTANDARD1.1 project with a reference to the "NETStandard.Library": "1.6.1".

By using nuget.org I searched for a "NETStandard.Library" version using the older System.IO.Compression 4.1.1, which is "NETStandard.Library" 1.6.0.

Using the "NETStandard.Library" 1.6.0. in the .NETSTANDARD 1.1 project fixed the unzip error.

I uploaded a sample solution to reproduce the error. https://1drv.ms/f/s!AqROiejT4oI3lMMc_jWogCQy36awrA

Answer 3

Fix for me was to add this to the first PropertyGroup in the .csproj file:

<NetStandardImplicitPackageVersion>1.6.0</NetStandardImplicitPackageVersion>

Visual Studio normally implicitly pulls in 1.6.1 for .NET Standard projects, which has the problematic System.IO.Compression 4.3.0. The directive tells it to pull down 1.6.0 instead, which depends on System.IO.Compression 4.1.1 (which works on Windows Phone).

Just make sure you don't have another NuGet reference which is pulling in 4.3.0. The correct file version for System.IO.Compression.dll is 1.0.24301.1 and the broken one is 4.6.xxxx .