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MailMessage.Load cannot load file on Android

Using Aspose.Email v22.6.0 in a Xamarin Forms v5 solution. Debugging from Windows VS 2019 and testing the app on a Samsung Galaxy running Android 11.

When calling MailMessage.Load I get the following error:
{System.IO.FileNotFoundException: Could not load the file ‘I18N, Version=2.0.5.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756’.File name: ‘I18N, Version=2.0.5.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756’ at System.AppDomain.Load (System.String assemblyString, System.Security.Policy.Evidence assemblySecurity, System.Boolean refonly, System.Threading.StackCrawlMark& stackMark) [0x00035] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System/AppDomain.cs:817 at System.AppDomain.Load (System.String assemblyString) [0x00002] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System/AppDomain.cs:796 at (wrapper remoting-invoke-with-check) System.AppDomain.Load(string) at System.Reflection.Assembly.Load (System.String assemblyString) [0x00000] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Reflection/Assembly.cs:429 at System.Text.EncodingHelper.InvokeI18N (System.String name, System.Object[] args) [0x0002c] in /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Text/EncodingHelper.cs:131 }

I’ve tried both calling the method with the a filename and with the file already loaded into a stream, same error each time.

It’s probably worth noting that when I tried to build the Android project it failed and said I needed to reference System.Formats.Asn1 from nuget. I’ve done that and it compiles, but cannot find a way past this FileNotFound error.

Here are the VS specs on the Windows machine:

Microsoft Visual Studio Professional 2019
Version 16.11.16
VisualStudio.16.Release/16.11.16+32602.291
Microsoft .NET Framework
Version 4.8.04084

Installed Version: Professional

Visual C++ 2019 00435-60000-00000-AA550
Microsoft Visual C++ 2019

ASP.NET and Web Tools 2019 16.11.106.23128
ASP.NET and Web Tools 2019

ASP.NET Web Frameworks and Tools 2019 16.11.106.23128
For additional information, visit https://www.asp.net/

Azure App Service Tools v3.0.0 16.11.106.23128
Azure App Service Tools v3.0.0

Azure Functions and Web Jobs Tools 16.11.106.23128
Azure Functions and Web Jobs Tools

C# Tools 3.11.0-4.22108.8+d9bef045c4362fbcab27ef35daec4e95c8ff47e1
C# components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Common Azure Tools 1.10
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Extensibility Message Bus 1.2.6 (master@34d6af2)
Provides common messaging-based MEF services for loosely coupled Visual Studio extension components communication and integration.

IntelliCode Extension 1.0
IntelliCode Visual Studio Extension Detailed Info

Microsoft Azure Tools for Visual Studio 2.9
Support for Azure Cloud Services projects

Microsoft Continuous Delivery Tools for Visual Studio 0.4
Simplifying the configuration of Azure DevOps pipelines from within the Visual Studio IDE.

Microsoft JVM Debugger 1.0
Provides support for connecting the Visual Studio debugger to JDWP compatible Java Virtual Machines

Microsoft Library Manager 2.1.113+g422d40002e.RR
Install client-side libraries easily to any web project

Microsoft MI-Based Debugger 1.0
Provides support for connecting Visual Studio to MI compatible debuggers

Microsoft Visual C++ Wizards 1.0
Microsoft Visual C++ Wizards

Microsoft Visual Studio Tools for Containers 1.2
Develop, run, validate your ASP.NET Core applications in the target environment. F5 your application directly into a container with debugging, or CTRL + F5 to edit & refresh your app without having to rebuild the container.

Microsoft Visual Studio VC Package 1.0
Microsoft Visual Studio VC Package

Mono Debugging for Visual Studio 16.10.15 (552afdf)
Support for debugging Mono processes with Visual Studio.

NuGet Package Manager 5.11.2
NuGet Package Manager in Visual Studio. For more information about NuGet, visit https://docs.nuget.org/

ProjectServicesPackage Extension 1.0
ProjectServicesPackage Visual Studio Extension Detailed Info

Razor (ASP.NET Core) 16.1.0.2122504+13c05c96ea6bdbe550bd88b0bf6cdddf8cde1725
Provides languages services for ASP.NET Core Razor.

SQL Server Data Tools 16.0.62205.05200
Microsoft SQL Server Data Tools

TypeScript Tools 16.0.30526.2002
TypeScript Tools for Microsoft Visual Studio

Visual Basic Tools 3.11.0-4.22108.8+d9bef045c4362fbcab27ef35daec4e95c8ff47e1
Visual Basic components used in the IDE. Depending on your project type and settings, a different version of the compiler may be used.

Visual F# Tools 16.11.0-beta.21514.6+b6c2c4f53ea3a08fa603ea93d6d2f808a62a21d1
Microsoft Visual F# Tools

Visual Studio Code Debug Adapter Host Package 1.0
Interop layer for hosting Visual Studio Code debug adapters in Visual Studio

Visual Studio Container Tools Extensions 1.0
View, manage, and diagnose containers within Visual Studio.

Visual Studio Tools for Containers 1.0
Visual Studio Tools for Containers

VisualStudio.DeviceLog 1.0
Information about my package

VisualStudio.Foo 1.0
Information about my package

VisualStudio.Mac 1.0
Mac Extension for Visual Studio

Xamarin 16.11.000.197 (d16-11@6934992)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin Designer 16.11.0.47 (remotes/origin/d16-11@e0d612363)
Visual Studio extension to enable Xamarin Designer tools in Visual Studio.

Xamarin Templates 16.10.5 (355b57a)
Templates for building iOS, Android, and Windows apps with Xamarin and Xamarin.Forms.

Xamarin.Android SDK 12.0.0.3 (d16-11/f0e3c2d)
Xamarin.Android Reference Assemblies and MSBuild support.
Mono: c633fe9
Java.Interop: xamarin/java.interop/d16-11@476bb5b
ProGuard: Guardsquare/proguard/v7.0.1@912d149
SQLite: xamarin/sqlite/3.35.4@85460d3
Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-11@87af37b

Xamarin.iOS and Xamarin.Mac SDK 15.2.0.17 (738fde344)
Xamarin.iOS and Xamarin.Mac Reference Assemblies and MSBuild support.

@louis.s

Please note that FileNotFoundException is thrown when an attempt to access a file that does not exist on disk fails. Please make sure that the file path is correct in your code example.

Please make sure that the file is available for import using MailMessage.Load method.

Hi Tahir,

Yes the file is definitely there, it’s also not the file that I’m loading which causes the FileNotFoundException - if you read the error that I posted it cannot find I18N.

As I also stated I have tried loading the file into a stream first, proving that there is data there for the load method. The issue is that the MailMessage.Load method in Xamarin.Android is trying to load something called I18N and it cannot.

@louis.s

To ensure a timely and accurate response, please attach the following resources here for testing:

  • Your input email file.
  • Please create a Xamarin application (source code without compilation errors) and attach the Visual Studio application here for testing.

As soon as you get these pieces of information ready, we will start investigation into your issue and provide you more information. Thanks for your cooperation.

PS: To attach these resources, please zip and upload them.