使用VsConnection WorkItemTrackingHttpClient补丁通过VSTS client API添加父关系

using Microsoft.VisualStudio.Services.Client;
using Microsoft.VisualStudio.Services.WebApi;
using Microsoft.TeamFoundation.WorkItemTracking.WebApi;

VssConnection connection = new VssConnection(new Uri("https://your-account.visualstudio.com"), new VssBasicCredential(string.Empty, "personal-access-token"));

WorkItemTrackingHttpClient witClient = connection.GetClient<WorkItemTrackingHttpClient>();

int parentId = 123;
int childId = 456;

JsonPatchDocument patchDocument = new JsonPatchDocument();
patchDocument.Add(new JsonPatchOperation()
{
    Operation = Operation.Add,
    Path = "/relations/-",
    Value = new
    {
        rel = "System.LinkTypes.Hierarchy-Reverse",
        url = $"{connection.Uri}/{connection.Project}/_apis/wit/workItems/{parentId}",
        attributes = new
        {
            comment = "Added parent-child relationship"
        }
    }
});

await witClient.UpdateWorkItemAsync(patchDocument, childId);