Azure Functions
An Azure service that provides an event-driven serverless compute platform.
5,930 questions
Could not load file or assembly 'Microsoft.Extensions.Logging.Abstractions when loading swagger.json
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(51.2, 75%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EO%3C/text%3E%3C/svg%3E)
onlyutkarsh
6
Reputation points MVP
Hello, I am on v3.x assemblies and trying to load swagger.json. However I am getting
Could not load file or assembly 'Microsoft.Extensions.Logging.Abstractions, Version=3.1.19.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.
at System.Signature.GetSignature(Void* pCorSig, Int32 cCorSig, RuntimeFieldHandleInternal fieldHandle, IRuntimeMethodInfo methodHandle, RuntimeType declaringType)
at System.Reflection.RuntimeMethodInfo.FetchNonReturnParameters()
at System.Reflection.RuntimeMethodInfo.GetParameters()
at Microsoft.Azure.WebJobs.Extensions.OpenApi.Core.Extensions.DocumentHelperExtensions.<>c.<GetHttpTriggerMethods>b__0_4(MethodInfo p)
at System.Linq.Utilities.<>c__DisplayClass1_0`1.<CombinePredicates>b__0(TSource x)
at System.Linq.Enumerable.WhereEnumerableIterator`1.ToList()
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at Microsoft.Azure.WebJobs.Extensions.OpenApi.Core.Extensions.DocumentHelperExtensions.GetHttpTriggerMethods(IDocumentHelper helper, Assembly assembly)
at Microsoft.Azure.WebJobs.Extensions.OpenApi.Document.Build(Assembly assembly, OpenApiVersionType version)
at Microsoft.Azure.WebJobs.Extensions.OpenApi.OpenApiTriggerFunctionProvider.RenderSwaggerDocument(HttpRequest req, String extension, ExecutionContext ctx, ILogger log)
The code is available here - https://github.com/onlyutkarsh/FSharpSwaggerProviderDemo and name of the Function project is FSSwaggerProviderDemo.MyWeatherApi
Azure Functions
Developer technologies | C#
11,578 questions
{count} vote
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 44%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESS%3C/text%3E%3C/svg%3E)
Samara Soucy - MSFT 5,141 Reputation points2021-09-17T00:22:30.267+00:00 It looks like in VS2019 the functions tools is overriding the version of Logging.Abstractions somehow even if I include the package explicitly. The same code runs fine if I run
func startoutside of Visual Studio. I'm looking for a way to resolve the conflict.
!132886-2021-09-16-19-51-47-fsswaggerproviderdemo-running.png
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onlyutkarsh 6 Reputation points MVP
2021-09-17T08:04:44.847+00:00 Just wanted to mention I am using Jetbrains Rider.
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Samara Soucy - MSFT 5,141 Reputation points
2021-09-19T23:26:44.2+00:00 Can you please check which version of Functions tools you are using?
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(150.4, 20%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ECG%3C/text%3E%3C/svg%3E)
Colin Green 1 Reputation point2021-10-11T15:02:00.847+00:00 I am getting this problem too, here is the Azure functions Core Tools version (taken from the the startuo console output):
Azure Functions Core Tools
Core Tools Version: 3.0.3442 Commit hash: 6bfab24b2743f8421475d996402c398d2fe4a9e0 (64-bit)
Function Runtime Version: 3.0.15417.0[...]
[2021-10-11T14:55:55.586Z] Request successfully matched the route with name 'RenderSwaggerDocument' and template 'swagger.{extension}'
[2021-10-11T14:55:55.595Z] Executing 'Functions.RenderSwaggerDocument' (Reason='This function was programmatically called via the host APIs.', Id=ce8575df-db8b-41c9-abd1-81367d9959b8)
[2021-10-11T14:55:55.598Z] Executing HTTP request: {
[2021-10-11T14:55:55.609Z] swagger.json was requested.
[2021-10-11T14:55:55.611Z] requestId: "0952dec9-6cad-45aa-9998-59e22e3b799e",
[2021-10-11T14:55:55.619Z] method: "GET",
[2021-10-11T14:55:55.620Z] userAgent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36",
[2021-10-11T14:55:55.621Z] uri: "/swagger/favicon-32x32.png"
[2021-10-11T14:55:55.622Z] }
[2021-10-11T14:55:55.627Z] Executed HTTP request: {
[2021-10-11T14:55:55.628Z] requestId: "0952dec9-6cad-45aa-9998-59e22e3b799e",
[2021-10-11T14:55:55.631Z] Could not load file or assembly 'Microsoft.Extensions.Logging.Abstractions, Version=3.1.19.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find the file specified.
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