Check out example codes for ".net directorysearcher get manager accountname". It will help you in understanding the concepts better.

Code Example 1

if (userAccount.Properties["manager"].Value != null)
{
  DirectorySearcher search2 = new DirectorySearcher(domain.GetDirectoryEntry())
  {
    Filter = string.Format("(distinguishedName={0})", userAccount.Properties["manager"].Value)
  };
  search2.PropertiesToLoad.Add("displayName");
  search2.PropertiesToLoad.Add("mail");
  search2.PropertiesToLoad.Add("manager");
  DirectoryEntry mgrAcc = search2.FindOne()?.GetDirectoryEntry();
}

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