how to mark emails as Read using latest Microsoft graph api C#

Question

Hello Team,

We used below code to mark emails as read using MS graph version 4.44

GraphServiceClient graphServiceClient =
                new GraphServiceClient(new DelegateAuthenticationProvider(async (requestMessage) =>
                {
                    // Add the access token in the Authorization header of the API request.
                    requestMessage.Headers.Authorization =
                            new AuthenticationHeaderValue("Bearer", token);
                })
                );
            graphServiceClient.Users[ConfigElements.MSGraphUserName].Messages[id].Request().Select("IsRead").UpdateAsync(new Message { IsRead = true }).GetAwaiter().GetResult();

Now we update MS graph version to 5.0.4 and the above stopped working as DelegateAuthenticationProvider not found.

Please help me to mark the email as read using this updated version of MS Graph

Answer 1

Hello Athulya Pillai,

Thanks for posting!

As per my research, we can't use DelegateAuthenticationProvider any more to use it directly to new GraphServiceClient(delegateAuthenticationProvider), if we want to generate the auth_provider to new GraphServiceClient, we have to follow to use BaseBearerTokenAuthenticationProvider + IAccessTokenProvider. Please refer the below GitHub thread:

https://github.com/microsoftgraph/msgraph-sdk-dotnet/issues/1368

Hope this helps.

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