Updating to Microsoft.Kiota.Http.HttpClientFactory 1.20 results in Method not found exception in Microsoft Graph

[newdigate]

In the latest release of microsoft kiota (v1.20), the constructor for HttpClientRequestAdapter has a new nullable HttpVersion parameter added in the constructor, which is used as a base class in microsoft.graph.core, and microsoft.graph

When updating our solution to latest microsoft kiota (v1.20), this change causes Microsoft.Graph to runtime error with a Method Not Found exception, as BaseGraphRequestAdapter constructor now needs to call its base constructor with a HttpVersion parameter at the end to avoid the MethodNotFound exception.

[newdigate]

dotnet framework v4.7.2, breaks on line 4 with

System.MissingMethodException: 'Method not found: 
'Void Microsoft.Kiota.Http.HttpClientLibrary.HttpClientRequestAdapter..ctor(Microsoft.Kiota.Abstractions.Authentication.IAuthenticationProvider, Microsoft.Kiota.Abstractions.Serialization.IParseNodeFactory, Microsoft.Kiota.Abstractions.Serialization.ISerializationWriterFactory, System.Net.Http.HttpClient, Microsoft.Kiota.Http.HttpClientLibrary.ObservabilityOptions)'.'

			var options = new TokenCredentialOptions { AuthorityHost = AzureAuthorityHosts.AzurePublicCloud };
			var clientSecretCredential = new ClientSecretCredential(tenantGUID, applicationID, clientSecret, options);
			string[] scopes = new [] {"https://graph.microsoft.com/.default"};
			var graphServiceClient = new GraphServiceClient(clientSecretCredential, scopes, $"{azureCloudInstance.GraphUrl}/v1.0");

[BartRolls]

I ran into the same issue you are facing with the 1.20.x version of the Microsoft.Kiota packages.
Upgrading to Version 1.21 (released October 28th 2025) of the packages solved it for me.

This is in combination with Microsoft.Graph 5.95.0

[newdigate]

Cool. Thank you for letting me know. @BartRolls