Error The type initializer for 'MongoDB.Driver.Core.Misc.DnsClientWrapper' threw an exception

Working with Data Drivers
1

Hello all, i have issue with Mongoclient in C#, always error “The type initializer for ‘MongoDB.Driver.Core.Misc.DnsClientWrapper’ threw an exception.” please help if any solution for this issue,

2

Hi, @Gudang_Distributor,

Welcome to the MongoDB Community Forums. In diagnosing this error, it would be helpful to know the following:

  • MongoDB .NET/C# Driver version
  • .NET version
  • Operating system and version
  • Full stack trace

The static constructor (aka type initializer) for DnsClientWrapper instantiates a LookupClient object from DnsClient.NET. The full stack trace should provide some clues as to why the LookupClient can’t be successfully instantiated.

James

2 Likes
3

Hello, @James_Kovacs thanks for your attention,

Here, I put the requirement that I used for mongo DB :
MongoDB .NET/C# Driver version : 2.11.5
.NET version : netcoreapp3.1 (Azure Function)
Operating system and version : Windows 11 Pro, Version 21H2
Full stack trace : The type initializer for ‘MongoDB.Driver.Core.Misc.DnsClientWrapper’ threw an exception. Thanks

Best Regards,
Andry Sistiawan

4

Same situation, “Could not load file or assembly ‘DnsClient’,Version=1.6.1.0,Culture=neutral,… or one of its dependencies. The loaded assembly’s manifest definition does not match the assembly reference.”
I have version 1.7.0.0 of DnsClient not 1.6.1.0. The NuGet dependency is listed as >= 1.6.1. What’s a developer to do?

Thanks

5

Turns out I needed a binding redirect to force 1.7.0.0 to be used.

6

Hi,

I encounter the following error when attempting to export data:

“Failed to insert documents into MongoDB: An exception was thrown by the type initializer for ‘MongoDB.Driver.Core.Misc.DnsClientWrapper’.”

I am using the following setup:

  • MongoDB Driver: 3.0.0
  • DNS Driver: 1.8
  • MongoDB Driver Code: 2.30.0
  • Operating System: Windows 11
  • Visual Studio 2022
  • Framework Version: 4.8

Any assistance would be greatly appreciated. Thank you!