How can I create a Planner Task Checklist?

[Gopher2000]

The example on creating a planner task checklist on throws a Microsoft.Graph.Models.ODataErrors.ODataError exception .

PlannerTests.cs hasn't been updated for the 5.X version yet.

I'm using the following code:

` public async static Task UpdateDetailsOfTaskAddChecklist(GraphServiceClient graphClient, PlannerTask plannerTask, string[] checklistItems)
{
PlannerTaskDetails requestBody = await graphClient.Planner.Tasks[plannerTask.Id].Details.GetAsync();
string eTag = requestBody.AdditionalData["@odata.etag"].ToString();

        requestBody.PreviewType = PlannerPreviewType.Checklist;

        if (requestBody.Checklist == null)
        {
            requestBody.Checklist = new PlannerChecklistItems();
            requestBody.Checklist.AdditionalData = new Dictionary<string, object>();
        }

        foreach (var i in checklistItems)
        {
            requestBody.Checklist.AdditionalData.Add(Guid.NewGuid().ToString(),
                new
                {
                    OdataType = "microsoft.graph.plannerChecklistItem",
                    Title = i,
                    IsChecked = false
                }
             );
        }



        var result = await graphClient.Planner.Tasks[plannerTask.Id].Details.PatchAsync(requestBody, (requestConfiguration) =>
        {
            requestConfiguration.Headers.Add("Prefer", "return=representation");
            requestConfiguration.Headers.Add("If-Match", eTag);
        });

        return result;
    }`

[andrueastman]

This should be resolved in the latest version 5.24.0 by specifying the type PlannerChecklistItem

        foreach (var i in checklistItems)
        {
            requestBody.Checklist.AdditionalData.Add(Guid.NewGuid().ToString(),
                new PlannerChecklistItem
                {
                    OdataType = "microsoft.graph.plannerChecklistItem",
                    Title = i,
                    IsChecked = false
                }
             );
        }

[Gopher2000]

Thanks, it works now.
foreach (var i in checklistItems) { requestBody.Checklist.AdditionalData.Add(Guid.NewGuid().ToString(), new PlannerCheckListItem { OdataType = "microsoft.graph.plannerChecklistItem", Title = i, IsChecked = false } ); }