Aspnetcore: EXEC : error : Could not load type 'System.Text.Json.Serialization.JsonSerializerOptions' from assembly 'System.Text.Json, Version=4.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.

Created on 13 Aug 2019 · 21Comments · Source: dotnet/aspnetcore

_From @vikramtamboli on Monday, August 12, 2019 5:30:09 AM_

Hi Team,

We are trying to compile source from https://github.com/SteveSandersonMS/presentation-2019-06-NDCOslo/tree/master/demos/MissionControl

When we run below command we get exception
D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Server>dotnet build

D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\MissionControl.Client.csproj : warning NU1603: RazorComponents.MaterialDesign 0.1.0-alpha-20190610102728 depends on Microsoft.AspNetCore.Components.Browser (>= 3.0.0-preview6.19305.13) but Microsoft.AspNetCore.Components.Browser 3.0.0-preview6.19305.13 was not found. An approximate best match of Microsoft.AspNetCore.Components.Browser 3.0.0-preview6.19307.2 was resolved. [D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Server\MissionControl.Server.csproj]
Restore completed in 108.36 ms for D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\MissionControl.Client.csproj.
D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Server\MissionControl.Server.csproj : warning NU1603: RazorComponents.MaterialDesign 0.1.0-alpha-20190610102728 depends on Microsoft.AspNetCore.Components.Browser (>= 3.0.0-preview6.19305.13) but Microsoft.AspNetCore.Components.Browser 3.0.0-preview6.19305.13 was not found. An approximate best match of Microsoft.AspNetCore.Components.Browser 3.0.0-preview6.19307.2 was resolved.
Restore completed in 505.88 ms for D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Server\MissionControl.Server.csproj.
Restore completed in 1.03 sec for D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\PinMapLibrary\PinMapLibrary.csproj.
Restore completed in 35.97 ms for D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Shared\MissionControl.Shared.csproj.
You are using a preview version of .NET Core. See: https://aka.ms/dotnet-core-preview
D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Server\MissionControl.Server.csproj : warning NU1603: RazorComponents.MaterialDesign 0.1.0-alpha-20190610102728 depends on Microsoft.AspNetCore.Components.Browser (>= 3.0.0-preview6.19305.13) but Microsoft.AspNetCore.Components.Browser 3.0.0-preview6.19305.13 was not found. An approximate best match of Microsoft.AspNetCore.Components.Browser 3.0.0-preview6.19307.2 was resolved.
You are using a preview version of .NET Core. See: https://aka.ms/dotnet-core-preview
You are using a preview version of .NET Core. See: https://aka.ms/dotnet-core-preview
D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\MissionControl.Client.csproj : warning NU1603: RazorComponents.MaterialDesign 0.1.0-alpha-20190610102728 depends on Microsoft.AspNetCore.Components.Browser (>= 3.0.0-preview6.19305.13) but Microsoft.AspNetCore.Components.Browser 3.0.0-preview6.19305.13 was not found. An approximate best match of Microsoft.AspNetCore.Components.Browser 3.0.0-preview6.19307.2 was resolved.
MissionControl.Shared -> D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Shared\bin\Debug\netstandard2.0\MissionControl.Shared.dll
PinMapLibrary -> D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\PinMapLibrary\bin\Debug\netstandard2.0\PinMapLibrary.dll
MissionControl.Client -> D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\bin\Debug\netstandard2.0\MissionControl.Client.dll
_EXEC : error : Could not load type 'System.Text.Json.Serialization.JsonSerializerOptions' from assembly 'System.Text.Json, Version=4.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. [D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\MissionControl.Client.csproj]
at Microsoft.AspNetCore.Blazor.Build.BootJsonWriter.GetBootJsonContent(String assemblyFileName, String entryPoint, String[] assemblyReferences, IEnumerable`1 embeddedContent, Boolean linkerEnabled)
at Microsoft.AspNetCore.Blazor.Build.BootJsonWriter.WriteFile(String assemblyPath, String[] assemblyReferences, String[] embeddedResourcesSources, Boolean linkerEnabled, String outputPath)
at Microsoft.AspNetCore.Blazor.Build.DevServer.Commands.WriteBootJsonCommand.<>c__DisplayClass0_0.b__0()
C:\Users\349185.nuget\packages\microsoft.aspnetcore.blazor.build\3.0.0-preview6.19307.2\targets\Blazor.MonoRuntime.targets(633,5): error MSB3073: The command "dotnet "C:\Users\349185.nuget\packages\microsoft.aspnetcore.blazor.build\3.0.0-preview6.19307.2\targets../tools/Microsoft.AspNetCore.Blazor.Build.dll" write-boot-json "obj\Debug\netstandard2.0\MissionControl.Client.dll" --references "D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\obj\Debug\netstandard2.0\blazor\bootjson-references.txt" --embedded-resources "D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\obj\Debug\netstandard2.0\blazor\embedded.resources.txt" --linker-enabled --output "D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\obj\Debug\netstandard2.0\blazor\blazor.boot.json"" exited with code 1. [D:\Workspaces\presentation-2019-06-NDCOslo-master\demos\MissionControl\MissionControl.Client\MissionControl.Client.csproj]_

Build FAILED.

Time Elapsed 00:00:13.34

_Copied from original issue: dotnet/corefx#40241_

area-blazor question

Source

pranavkm

All 21 comments

_From @aeastham67 on Monday, August 12, 2019 11:21:44 AM_

I just saw this too. Is there a workround for this? Thanks

pranavkm on 13 Aug 2019

_From @aeastham67 on Monday, August 12, 2019 11:54:11 AM_

For info, I just updated Microsoft.AspNetCore.Blazor and Microsoft.AspNetCore.Blazor.Build to Latest Prerelease 3.0.0-preview-7.193365.7 which fixed this.

pranavkm on 13 Aug 2019

_From @steveharter on Monday, August 12, 2019 8:52:31 PM_

@pranavkm @rynowak PTAL. Some versioning issues? Looks like upgrading to latest addresses the issue.

pranavkm on 13 Aug 2019

_From @pranavkm on Monday, August 12, 2019 10:13:34 PM_

@vikramtamboli, it's likely that you have a preview7 SDK \ runtime installed which had a couple of API breaking changes. As @aeastham67 pointed out, upgrading to preview7 should resolve the issue. Feel free to file a new issue in https://github.com/aspnet/AspNetCore/issues if you're still seeing this after you upgrade.

pranavkm on 13 Aug 2019

_From @vikramtamboli on Tuesday, August 13, 2019 5:00:07 AM_

Thanks for the help

My dotnet version is 3.0.100-preview7-012821

@aeastham67 - I already upgraded to latest preview packages available in nuget for all projects still not able to compile
tried with visual studio 2019 preview version as well
also tried adding System.Text.Json to MissionControl.Client

little more help needed here to get this working

pranavkm on 13 Aug 2019

_From @pranavkm on Tuesday, August 13, 2019 12:36:39 PM_

@vikramtamboli could you include the output from dotnet --info?

pranavkm on 13 Aug 2019

_From @vikramtamboli on Tuesday, August 13, 2019 2:07:10 PM_

C:\Users>dotnet --info
.NET Core SDK (reflecting any global.json):
Version: 3.0.100-preview7-012821
Commit: 6348f1068a

Runtime Environment:
OS Name: Windows
OS Version: 10.0.18362
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\3.0.100-preview7-012821\

Host (useful for support):
Version: 3.0.0-preview7-27912-14
Commit: 4da6ee6450

.NET Core SDKs installed:
2.1.700 [C:\Program Files\dotnet\sdk]
2.1.801 [C:\Program Files\dotnet\sdk]
2.2.401 [C:\Program Files\dotnet\sdk]
3.0.100-preview7-012821 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.0-preview7.19365.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.6 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0-preview7-27912-14 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.0.0-preview7-27912-14 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download

pranavkm on 13 Aug 2019

Is there an update on this issue?

@vikramtamboli, is this still reproducible for you with 3.0-preview9 bits?

ahsonkhan on 11 Sep 2019

I'm getting this error even with 3.0 GA:

.NET Core SDK (reflecting any global.json):
 Version:   3.0.100
 Commit:    04339c3a26

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.14
 OS Platform: Darwin
 RID:         osx.10.14-x64
 Base Path:   /usr/local/share/dotnet/sdk/3.0.100/

Host (useful for support):
  Version: 3.0.0
  Commit:  7d57652f33

.NET Core SDKs installed:
  2.1.4 [/usr/local/share/dotnet/sdk]
  2.1.505 [/usr/local/share/dotnet/sdk]
  2.2.300 [/usr/local/share/dotnet/sdk]
  3.0.100 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.0.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.13 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

carlocardella on 29 Sep 2019

im also having this issue

gabrielfreire on 3 Oct 2019

In my scenario I was writing a Powershell cmdlet for PSCore and while I was running dotnet3 I had imported the nuget package System.Management.Automation v. 6.2.x; the error went away after I switched to 7.0.0-preview.4

carlocardella on 4 Oct 2019

im also having this issue using Identityserver4.

Host (useful for support):
Version: 3.0.0-preview-27324-5
Commit: 63a01b08e5

.NET Core SDKs installed:
No SDKs were found.

.NET Core runtimes installed:
Microsoft.AspNetCore.App 3.0.0-preview-19075-0444
Microsoft.NETCore.App 3.0.0-preview-27324-5
`

TulyOpt on 7 Oct 2019

I'm getting this by trying to use the Microsoft.AspNetCore.ProtectedBrowserStorage library which I know is in Alpha - damn annoying as it seemed a great way to use SessionStorage :(

I have the following SDKS installed

3.0.100-preview7-012821 [/usr/local/share/dotnet/sdk]
3.0.100-preview8-013656 [/usr/local/share/dotnet/sdk]
3.0.100-preview9-014004 [/usr/local/share/dotnet/sdk]
3.0.100-rc1-014190 [/usr/local/share/dotnet/sdk]
3.0.100 [/usr/local/share/dotnet/sdk]

And runtimes
Microsoft.NETCore.App 3.0.0-preview7-27912-14 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0-preview9-19423-09 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0-rc1-19456-20 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

I'm building and running on a Mac - maybe that's the issue?

markgr on 9 Oct 2019

Hi @markgr , i solved my problem using the .NET Core 3.0 GA instead of the preview one. See https://github.com/dotnet/corefx/issues/41591

TulyOpt on 9 Oct 2019

On 10/15/2019 @ 5:54 pm - I spent 2 hours trying everything in this thread.

I tried the simplest solutions including just switching my versions of Microsoft.NetCore
I also attempted to use different methods to parse
Because I'm on a timeline, I had to drop back and punt because my code has to be production ready and I cannot afford to take too many chances and break my release cycle

The System.Text.Json is just not mature enough yet

I had to drop back from
OpportunityChangesLastXMins oBody = JsonSerializer.Deserialize(sJSON);

To:
OpportunityChangesLastXMins oBody = JsonConvert.DeserializeObject(sJSON);

I tried almost everything in this chain.

Also, I will say this, I'm using Azure functions to code my solution and the code ONLY breaks in the Visual Studio Azure functions testing harness.

I broke my code out in a .NetCore Console App and it worked perfectly using System.Text.Json.

So, it might be something in one of my many runtimes.

dtate22 on 15 Oct 2019

@TulyOpt I created a basic server webapp and even with the GA release can still repo the problem....

Pull https://github.com/markgr/BlazorJson

Then run it (dotnet run)

Open Index page and click the 'Test Storage' button - you'll get the exception in the Console....

dotnet --list-sdks
2.1.505 [/usr/local/share/dotnet/sdk]
2.2.104 [/usr/local/share/dotnet/sdk]
2.2.105 [/usr/local/share/dotnet/sdk]
2.2.401 [/usr/local/share/dotnet/sdk]
3.0.100 [/usr/local/share/dotnet/sdk]

dotnet --list-runtimes
Microsoft.AspNetCore.All 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.3 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.3 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.13 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.3 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

markgr on 16 Oct 2019

@markgr your project's referencing the Microsoft.AspNetCore.ProtectedBrowserStorage package that hasn't been updated to be be compiled against the RTM version of .NET Core. We'll use a separate issue to track fixing it. Note that the package is experimental and isn't actively supported.

@dtate22 it's not clear what's causing the issue, but it's most likely an out-of-date reference. I may be mistaken, but I don't think .NET Core 3.0 is supported on Azure Functions as yet, I'm not sure if using ASP.NET Core 3.0 with it is going to ultimately succeed at this point.

Generally you should only see this error if you're referencing a package \ library that was compiled against a preview build of .NET Core or the System.Text.Json package. Since 3.0 is now RTM, we anticipate library authors to rebuild against the RTM versions of the framework which should resolve this issue.

If you're still seeing this issue, please file separate issues possibly with a minimal repro app.

pranavkm on 16 Oct 2019

👎1 👍1

Also, I will say this, I'm using Azure functions to code my solution and the code ONLY breaks in the Visual Studio Azure functions testing harness.

@dtate22, The Azure Functions host pins the assembly version it loads and since it generally lags behind the latest releases, you'd see type mismatch/missing issue until AF catches to the latest version of .NET Core - this is a known issue specific to AF - feel free to follow up on https://github.com/Azure/azure-functions-host

From https://github.com/Azure/azure-functions-host/issues/5031#issuecomment-539117007

We'll have a preview (with a supporting version of the CLI) available very soon. Please keep an eye on the announcement @espray linked above as we'll update it once those bits become available.

ahsonkhan on 16 Oct 2019

👍1

@ahsonkhan - Hey man, thanks for the information... (Thanks for the information - I will go to the URL listed above)

It's crazy how many different places you have to look to solve a problem.

@pranavkm - I used the following tested versions before posting to the blog. I didn't want to mis-lead people because I hadn't done my research

.netCore 2.0 - failed (nuget System.Text.Json version)
.netCore 2.1 - failed (nuget System.Text.Json version)
.netCore 2.2 - failed (nuget System.Text.Json version)
.netCore 3.0 - failed (for this version, I had to uninstall the packages because the JSON is native)
.netCore 3.1 - failed - would not compile my Azure Function

@markgr - Thanks for the commands - here's my dump
dotnet --list-sdks
2.1.602 [C:\Program Files\dotnet\sdk]
2.1.700 [C:\Program Files\dotnet\sdk]
2.1.801 [C:\Program Files\dotnet\sdk]
3.0.100 [C:\Program Files\dotnet\sdk]
3.1.100-preview1-014459 [C:\Program Files\dotnet\sdk]

dotnet --list-runtimes
Microsoft.AspNetCore.All 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.0-preview1.19508.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.12 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 2.1.13 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.0-preview1.19506.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.0-preview1.19506.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

You guys are great - thanks for helping me out by posting the information above - appreciate it!

Later

dtate22 on 16 Oct 2019

I rebuilt the code for Microsoft.AspNetCore.ProtectedBrowserStorage inside my project and it's working now - so you are right we just need a build with the GA release - works well....

Mark

markgr on 17 Oct 2019

I was having this issue inside Docker, i fixed it by changing the image.

I was using mcr.microsoft.com/dotnet/core/aspnet:3.0-stretch or mcr.microsoft.com/dotnet/core/aspnet:3.0-slim, can't remember the exact name now, sorry.

I changed to just mcr.microsoft.com/dotnet/core/aspnet:3.0 without the -slim/-stretch sufix and it worked.

gabrielfreire on 17 Oct 2019

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