Assuming a solution with the following project/code structure:
PollySeven.MyHttpClient depends on Microsoft.Extensions.Http.Polly (which depends on Polly v6).PollySeven.MyHttpClient uses RetryAsync() extension method to register MyService.PollySeven depends on PollySeven.MyHttpClient and Polly v7.PollySeven uses MyService.
PollySeven
public static void Main(string[] args)
{
var services = new ServiceCollection();
services.AddMyServices();
ServiceProvider provider = services.BuildServiceProvider(true);
var service = provider.GetRequiredService<MyService>();
// System.TypeLoadException:
// 'Could not load type 'Polly.RetrySyntaxAsync' from assembly
// 'Polly, Version=7.0.0.0, Culture=neutral, PublicKeyToken=c8a3ffc3f8f825cc'.'
}
PollySeven.MyHttpClient
public static IServiceCollection AddMyServices(this IServiceCollection services)
{
services.AddHttpClient<MyService>()
.AddTransientHttpErrorPolicy(p => p.RetryAsync());
return services;
}
When the application runs, I get System.TypeLoadException.
The root cause of this issue might be similar to #611.
Expected behavior:
Code executes successfully.
Actual behaviour:
System.TypeLoadException is thrown:
Could not load type 'Polly.RetrySyntaxAsync' from assembly
'Polly, Version=7.0.0.0, Culture=neutral, PublicKeyToken=c8a3ffc3f8f825cc'.
Steps / Code to reproduce the problem:
Example repo: https://github.com/altso/PollySeven
arphox, AlexBroitman and shagilt
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