How Do I Add Progressbar By Detecting Start And End Of A Method?

public void codeCover
{
   //code for reading a XML file
}

private void backgroundWorker1_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
        {
           
            codeCoverage();
            
            //as it takes int as a parameter i am not able to understand how do i check when the method starts and stops.
            backgroundWorker1.ReportProgress(i);
           
        }

        private void backgroundWorker1_ProgressChanged(object sender, System.ComponentModel.ProgressChangedEventArgs e)
        {
            progressBar1.Value = e.ProgressPercentage;
            label1.Text = e.ProgressPercentage.ToString() + "%";
        }

        private void backgroundWorker1_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e)
        {
            label1.Text = "completed!!";
        }

       
    }