Change Task Edit form of workflow in SharePoint 2010

I want to change task edit form of the workflow when approver want to approve/reject task. I have created some code to change task edit form. Please review and suggest me improvement. Or it will be better if you have any other possible solution.

public void createTask1_MethodInvoking(object sender, EventArgs e)
{
   createTask1_TaskId1 = Guid.NewGuid();             
   createTask1_TaskProperties1.Title = "Test Title";             
   createTask1_TaskProperties1.AssignedTo = "i:0#.w|directory\approver";             
   var taskList = workflowProperties.TaskList;                             
   var wfContentType = taskList.ContentTypes["Workflow Task"];             
   TaskTitle = workflowProperties.Item["Title"].ToString();             
   wfContentType.DisplayFormUrl = "_Layouts/SharePointProject4/ApplicationPage1.aspx";          wfContentType.EditFormUrl = wfContentType.DisplayFormUrl;             
   wfContentType.Update();             
   taskList.NavigateForFormsPages = false;             
   taskList.Update();         
}