CODEWITHSUNDEEP
c#.netasp.net-mvc
user1892134
user1892134

Reputation: 121

Type Load error in System.IdentityModel.Tokens.Jwt

I am seeing a System.Reflection.ReflectionTypeLoadException at runTime:

Could not load type 'System.IdentityModel.Tokens.ISecurityTokenValidator' from assembly 'System.IdentityModel.Tokens.Jwt, Version=5.0.0.127, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.":"System.IdentityModel.Tokens.ISecurityTokenValidator

I am using System.IdentityModel.Tokens.Jwt version 5.0.0.127 (nuget package 5.0.0)

I have tried using fuslog to look at the binding log. It finds the dll in my bin directory and the bind succeeds (and it is the correct dll). I've also verified that I don't have this library installed in the GAC.

I used visual studio's object browser and went looking through the dll. I found that JwtSecurityTokenHandler inherits from ISecurityTokenValidator. According to the object browser ISecurityTokenValidtor comes from Microsoft.IdentityModel.Tokens. (I am using nuget package 5.0.0 of that one also).

I manually went through the various nuget dependencies related to these two packages (as well as any others in my project that I thought had a chance of being relevant). Everything appears to check out.

Can anyone explain under what circumstances you would be unable to load a type from an assembly? And can anyone explain to me how to properly resolve the issue with this specific library?

Upvotes: 0

Views: 5533

Answers (1)

Mahdi Shahbazi
Mahdi Shahbazi

Reputation: 1073

In My case I removed the "Microsoft.IdentityModel.Protocol.Extensions" from my packages. and worked like a charm.

Upvotes: 1

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