Need Help Updating Planner Task Details Using Microsoft Graph SDK in C#

Hello everyone,

I am facing challenges while trying to update Planner task details using the Microsoft Graph SDK in C#. I have followed the official documentation (https://learn.microsoft.com/en-us/graph/api/plannertaskdetails-update?view=graph-rest-1.0&tabs=csharp#request-headers) , but I'm encountering issues with the provided methods. Here are the details of the problem:

1. Using PatchAsync:
The method PatchAsync mentioned in the documentation is not available in the Graph SDK version 4.44.4 that I'm using. I get a compile-time error when attempting to use this method.

graphClient.Planner.Tasks[task.Id].Details.Request(headers).PatchAsync(requestBody);

2. Using PutAsync:

• I tried using the PutAsync method, but I received the following error:
  

Microsoft.Graph.ServiceException
Message: No HTTP resource was found that matches the request URI 'https://tasks.office.com:444/taskapi/V3.0/tasks({task-Id})/details'.

3. Using CreateAsync and UpdateAsync:

• I attempted to use CreateAsync and UpdateAsync methods, but encountered errors related to routing conventions and null values in the request.
  

  Here is how I am constructing the request:

  • Headers:
    

var headers = new List<HeaderOption>
{
    new HeaderOption("Prefer", "return=representation"),
    new HeaderOption("If-Match", TaskETag)
};

Request Body:

var requestBody = new PlannerTaskDetails
{
    Checklist = new PlannerChecklistItems
    {
        AdditionalData = new Dictionary<string, object>
        {
            {
                check.Key , new
                {
                    OdataType = "microsoft.graph.plannerChecklistItem",
                    Title = check.Value.Title,
                    IsChecked = check.Value.IsChecked,
                }
            }
        },
    },
};

I am seeking guidance on how to properly update task details in Planner using the Microsoft Graph SDK in C#. My goal is to create checklists as Team 1 in Team 2.

Any help or insights on how to resolve this issue would be greatly appreciated. Thank you in advance for your assistance!