The operation of the "CheckFileSystemCaseSensitive" task has encountered an unexpected failure. It was unable to load the file or assembly 'System.IO.FileSystem'

I recently upgraded my Visual Studio 2017 ASP.NET Core MVC web project by adding the Microsoft.TypeScript.MSBuild NuGet package v2.3.1 and updating my ASP.NET Core assemblies from 1.0.* to 1.1.1. However, after these changes, I encountered a new exception when building my project:

Severity    Code    Description Project File    Line    Suppression State
Error   MSB4018 The "CheckFileSystemCaseSensitive" task failed unexpectedly.
System.IO.FileNotFoundException: Could not load file or assembly 'System.IO.FileSystem, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
File name: 'System.IO.FileSystem, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at TypeScript.Tasks.CheckFileSystemCaseSensitive.Execute()
   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
   at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()

When I double-click on the exception message, it takes me to specific lines in the file Microsoft.TypeScript.targets where the error indicates that "MSBuildThisFileFullPath is not defined".

<Target Name="CheckFileSystemCaseSensitive">
    <CheckFileSystemCaseSensitive
       MSBuildThisFileFullPath="$(MSBuildThisFileFullPath)" >
      <Output TaskParameter="IsFileSystemCaseSensitive"  PropertyName="IsFileSystemCaseSensitive" />
    </CheckFileSystemCaseSensitive>
</Target>

I've attempted to resolve this issue by adding references to NETStandard.Library as suggested here, but unfortunately, that has not made any difference.

Here is an excerpt of the diagnostic MSBuild output related to this problem:

1>Target "CheckFileSystemCaseSensitive" in file "C:\Users\dkent\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\Microsoft.TypeScript.targets":
1>  Using "CheckFileSystemCaseSensitive" task from assembly "C:\Users\dkent\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\TypeScript.Tasks.dll".
1>  Task "CheckFileSystemCaseSensitive"
1>    Task Parameter:MSBuildThisFileFullPath=C:\Users\dkent\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\Microsoft.TypeScript.targets
1>    [...]\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\Microsoft.TypeScript.targets(172,5): error MSB4018: The "CheckFileSystemCaseSensitive" task failed unexpectedly.
1>    [...]\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\Microsoft.TypeScript.targets(172,5): error MSB4018: System.IO.FileNotFoundException: Could not load file or assembly 'System.IO.FileSystem, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
1>    [...]\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\Microsoft.TypeScript.targets(172,5): error MSB4018: File name: 'System.IO.FileSystem, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
1>    [...]\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\Microsoft.TypeScript.targets(172,5): error MSB4018:    at TypeScript.Tasks.CheckFileSystemCaseSensitive.Execute()
1>    [...]\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\Microsoft.TypeScript.targets(172,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
1>    [...]\.nuget\packages\microsoft.typescript.msbuild\2.3.1\tools\netstandard1.3\Microsoft.TypeScript.targets(172,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__26.MoveNext()
1>  Done executing task "CheckFileSystemCaseSensitive" -- FAILED.

If anyone has any suggestions on how to resolve this issue, I would greatly appreciate your input. Thank you.

typescriptmsbuildvisual-studio-2017asp.net-core-1.1

Answer №2

(previous query, although outdated, could still be beneficial for others seeking a resolution to this particular problem):

For an alternative approach to configuring TypeScript within your Visual Studio project, consider incorporating the Microsoft TypeScript Compiler NuGet package into the solution instead of utilizing the Microsoft.TypeScript.MSBuild package. It may be necessary to adjust the <TypeScriptToolsVersion> setting in the .csproj file (only indicating the minor and major version):\n

<TypeScriptToolsVersion>3.0</TypeScriptToolsVersion>\n

Answer №3

To get TypeScript 3.0 for Visual Studio 2017, simply download the TypeScript 3.0 SDK directly from the official TypeScript SDK download page.Click here to download

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