Runtime: SqlClient fails with netcoreapp2.0 on Win7/Server2008

[smitpatel]

Repro steps:
Build https://github.com/aspnet/EntityFramework on windows 7 machine. All tests which uses SqlServer fails. (Tests uses localdb). Same passes in windows10/Server 2012 machines.

Exception message:
Error Message: System.DllNotFoundException : Unable to load DLL 'sni.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E) Stack Trace: at System.Data.SqlClient.SNINativeMethodWrapper.UnmanagedIsTokenRestricted(IntPtr token, Boolean& isRestricted) at System.Data.Win32NativeMethods.IsTokenRestrictedWrapper(IntPtr token) at System.Data.ProviderBase.DbConnectionPoolIdentity.GetCurrent() at System.Data.ProviderBase.DbConnectionPoolGroup.GetConnectionPool(DbConnectionFactory connectionFactory) at System.Data.ProviderBase.DbConnectionFactory.GetConnectionPool(DbConnection owningObject, DbConnectionPoolGroup connectionPoolGroup) at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) at System.Data.SqlClient.SqlConnection.Open()

dotnet info

.NET Command Line Tools (2.0.0-preview1-005783)

Product Information:
 Version:            2.0.0-preview1-005783
 Commit SHA-1 hash:  8bd15c7ec0

Runtime Environment:
 OS Name:     Windows
 OS Version:  6.1.7601
 OS Platform: Windows
 RID:         win7-x64
 Base Path:   C:\Users\smpatel\AppData\Local\Microsoft\dotnet\sdk\2.0.0-preview1-005783\

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.0-preview1-001967-00
  Build    : fa25acec41a87ce36b3ea61273d4798eb0a2486f

cc: @Eilon

[corivera]

sni.dll should be getting pulled down from nuget. Is that DLL present in your nuget/packages directiory?

[smitpatel]

Which package to look for?

[smitpatel]

More detailed repro details:
Program.cs
```C#
using System;
using System.Data.SqlClient;

namespace repor
{
class Program
{
static void Main(string[] args)
{
var connectionString =
@"Data Source=(localdb)\MSSQLLocalDB;Database=master;Connect Timeout=30";
using (var connection = new SqlConnection(connectionString))
{
connection.Open();
Console.WriteLine("ServerVersion: {0}", connection.ServerVersion);
Console.WriteLine("State: {0}", connection.State);
}

        Console.WriteLine("Hello World!");
    }
}

}

```XML
<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="System.Data.SqlClient" Version="4.3.0" />
  </ItemGroup>
</Project>

Output

Unhandled Exception: System.TypeInitializationException: The type initializer for 'System.Data.SqlClient.TdsParser' threw an exception. ---> System.TypeInitializationException: The type initializer for 'System.Data.SqlClient.SNILoadHandle' threw an exception. ---> System.DllNotFoundException: Unable to load DLL 'sni.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
   at System.Data.SqlClient.SNINativeMethodWrapper.SNIInitialize(IntPtr pmo)
   at System.Data.SqlClient.SNILoadHandle..ctor()
   at System.Data.SqlClient.SNILoadHandle..cctor()
   --- End of inner exception stack trace ---
   at System.Data.SqlClient.TdsParser..cctor()
   --- End of inner exception stack trace ---
   at System.Data.SqlClient.TdsParser..ctor(Boolean MARS, Boolean fAsynchronous)
   at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, BooleanredirectedUserInstance, SqlConnectionString connectionOptions, TimeoutTimer timeout)
   at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, Boolean redirectedUserInstance)
   at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, Boolean applyTransientFaultHandling)
   at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningObject, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
   at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
   at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
   at System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
   at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
   at System.Data.SqlClient.SqlConnection.Open()
   at repor.Program.Main(String[] args)

[mikeharder]

This is blocking ASP.NET builds.

[weshaggard]

sni.dll should be coming from https://www.nuget.org/packages/runtime.win7-x64.runtime.native.System.Data.SqlClient.sni. Can you check the assets file to make sure that it is correctly getting picked up from the tooling?

[mikeharder]

CC @davidfowl

[weshaggard]

To update this issue. It was discovered the problem is that sni.dll depends on api-sets on Win7 and those are no longer included in .NET Core 2.0 shared framework. So to make this scenario work you either need to directly reference https://www.nuget.org/packages/runtime.win7-x64.Microsoft.NETCore.Windows.ApiSets/ to get the api-set shims or reference the newer version of SqlClient package (>4.4.0).

[twDuke]

Using dapper 1.50.2, which has a dependency on SqlClient 4.1, caused this issue. Explicitly installing SqlClient 4.4 indeed solved the issue.

[jmkni]

@twDuke This applies to ServiceStack.OrmLite.SqlServer aswell, explicitly installing 4.4 fixes things!

[hanssens]

Same issue with NPoco v3.8.0 - manually adding System.Data.SqlClient as a nuget package (v4.4.0) fixed it for me as well.

Minor note: I only had the error during deploy to Azure and not when debugging on localhost.

[geschw66]

I have an ASP .NET Core MVC project that is getting this error. Are you saying I need to simply install the
the package: System.Data.SqlClient version 4.4.0 or ???

PM> Install-Package System.Data.SqlClient -version 4.4.0

Is this what I need to do to avoid the above described exception?

[BrandonClapp]

I had the same sni.dll error. Installing System.Data.SqlClient (I installed 4.4.2) worked to fix the problem.

@geschw66 Did installing the package fix the issue for you?

[besley]

.net core 2.1, System.Data.SqlClient 4.6.1 meet the same issue. After install Microsoft.AspNetCore.All 2.1.11 fixed the issue.

[hanssens]

@besley Good to know. BTW, please be aware that from dotnet core 2.2 and higher, the Microsoft.AspNetCore.All package doesn't include System.Data.SqlClient anymore. This means from v2.2+ and higher. Should you upgrade in the future to that version, you still need to manually reference System.Data.SqlClient in that case.

Also the Microsoft.AspNetCore.All is quite a big package. If you don't have a direct need for it, it's best to not reference all the stuff in there.