Hi ramco1917,

Use Message property of Exception class to display the exact error.

Code

[HttpGet]
public ActionResult Delete()
{
    try
    {
        return PartialView("_DeletePartial");
    }
    catch (Exception ex)
    {
        ExceptionLogging.SendExcepToDB(ex);
        TempData["Message"] = ex.Message;
    }
    return null;
}

For more details refer below article.

Create simple Error Log Text File in ASP.Net using C# and VB.Net