public void RemoveAt(int index) { if (this.HandleCreated) { this.JumpListControl.ClearAllUserTasks(); } IJumpListItem old = this.Items[index]; this.Items.RemoveAt(index); old.Release(); if (this.HandleCreated) { foreach (IJumpListItem item in this.Items) { this.JumpListControl.AddUserTasks(item.ToJumpListTask()); } this.JumpListControl.KnownCategoryToDisplay = Microsoft.WindowsAPICodePack.Taskbar.JumpListKnownCategoryType.Neither; this.JumpListControl.Refresh(); } }