Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe'

Question

Trying to use SQLTypeProvider with postgres I get the following errorwhen running

dotnet build

error FS3033: The type provider 'FSharp.Data.Sql.SqlTypeProvider' reported an error: Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe, Version=4.0.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified. [/home/sashan/code/titan/src/Server/Server.fsproj]

my data provider is this:

type SQL = SqlDataProvider< 
                  ConnectionString = pg_dev_conn_string,
                  DatabaseVendor = Common.DatabaseProviderTypes.POSTGRESQL,
                  UseOptionTypes = true >

If I change it to the following

type SQL = SqlDataProvider< 
              ConnectionString = pg_dev_conn_string,
              DatabaseVendor = Common.DatabaseProviderTypes.POSTGRESQL,
              ResolutionPath = "/home/sashan/code/dotnet/2.1.500/sdk/NuGetFallbackFolder/system.runtime.compilerservices.unsafe/4.5.1/lib/netcoreapp2.0",
              UseOptionTypes = true >

The error goes away but I don't understand why. The fix seems really weird. Why should I have to point it to a file outside of my project? Shouldn't the System.Runtime.CompilerServices.Unsafe.dll be somewhere in one of project's subdirectories where the compiler can find it?

Did you ever solve this? I ran into it today. I am using macOS. Thanks — boggy, Sep 24 '19 at 07:38

score 7 · Answer 1 · answered Feb 18 '19 at 15:19

7

I had the same problem with unity container and after updated this dll from Nuget my problem solved

answered Feb 18 '19 at 15:19

Maryam

105
1
7

score 5 · Answer 2 · answered Apr 11 '20 at 00:01

5

i fix it comenting in web.config the entry that contains System.Runtime.CompilerServices.Unsafe

answered Apr 11 '20 at 00:01

Giancarlo Molina

61
1
1

Prashant Manjule · Answer 3 · 2020-11-10T03:11:26.573

3

Try it in CMD,

you can find gacutil in(C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools>), and other installed frameworks in bin folder, try runs same commands for other '..\bin\NETFX x.x Tools' frameworks if necessary

C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools>

gacutil -i "C:\Program Files\dotnet\sdk\3.1.401\Sdks\Microsoft.NET.Sdk.WindowsDesktop\tools\net472\System.Runtime.CompilerServices.Unsafe.dll"

edited Nov 10 '20 at 03:11

answered Nov 10 '20 at 03:05

Prashant Manjule

312
1
6

1

It did not work for me, so finally I used the NuGet package manager to uninstall the problematic item and reinstall them. – Jonathan Rosenne Nov 27 '20 at 12:14

score 0 · Answer 4 · answered Dec 16 '22 at 17:21

I don't know the exact cause of this problem (and other problems alike, which Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe'... But in my case the solution was:

Reinstall the System.Runtime.CompilerServices.Unsafe starting with all dependant packages.

Be sure you take note of the dependency tree (NuGet package name and version), you may need the information down the road.

Could not load file or assembly 'System.Runtime.CompilerServices.Unsafe'

4 Answers4

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