File I/O is not working

[Fabi]

Getting pathes from the Directory classes are fine, however creating or reading files let the native app crash.

I tried simple code like
File.Create("bob.txt");
or
var fs = new FileStream("bob.txt", FileMode.Append);

Using RyuJIT compiler it prints me "Unhandled Exception: System.IO.FileNotFoundException: IO_FileNotFound_FileName
IO_FileName_Name"

and using the cpp one I'm not even able to build in debug mode.

[MichalStrehovsky]

It compiles, but at runtime it prints:

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'System.Threading.Overlapped'. The system cannot find the file specified.
File name: 'System.Threading.Overlapped'

This is because System.Threading.Overlapped.dll wasn't present in the inputs to the compiler. This is in the same bucket as e.g. #2110 and is caused by various cherry picked framework assemblies that don't match or are incomplete. There's work scheduled to fix this.

CppCodegen is hitting various problems related to lazy P/invokes and the missing handling of RVA static fields. I filed a separate issue #2149 on it.

Cc @joshfree @SedarG

[Fabi]

Without cpp codegen it works fine for me, thanks!

With cpp:

`C:\Users\Fabian\Documents\Development\nativetest>dotnet build /t:LinkNative /p:NativeCodeGen=cpp
Microsoft (R) Build Engine version 15.1.458.808
Copyright (C) Microsoft Corporation. All rights reserved.

nativetest.cpp
C:\Users\Fabian\Documents\Development\nativetest\Program.cs(109752): error C2440: 'initializing': cannot convert from 'System_Private_CoreLib::System::Threading::NativeOverlapped *' to 'intptr_t' [C:\Users\Fabian\Documents\Development\nativetest\nativetest.csproj]
C:\Users\Fabian\Documents\Development\nativetest\Program.cs(109752): note: There is no context in which this conversion is possible
C:\Users\Fabian\corert\bin\Product\Windows_NT.x64.Release\packaging\publish1\Microsoft.NETCore.Native.targets(117,5): error MSB3073: The command "cl @"obj\X64\Debug\netcoreapp1.0\native\cl.rsp"" exited with code 2. [C:\Users\Fabian\Documents\Development\nativetest\nativetest.csproj]`

[jkotas]

@Fabi Thanks for giving it a try! I have create a new issue for the CppCodeGen bug.