C#

... loading data ...<br />
MyTable.AcceptChanges();<br />
foreach(DataRow dr in MyTable.Rows)<br />
{<br />
 foreach(string fieldname in MySomeColumnsStringArray)<br />
 {<br />
  ... some computing ...<br />
  double x=Result(...);<br />
  x+=Convert.ToDouble(dr[fieldname]); // works ok, x is ok<br />
  try<br />
  {<br />
   dr[fieldname]=x; // sometimes generates Null Object Reference<br />
  }<br />
  catch(...<br />
 }<br />
}

<br />
private void ShortendVoid(string FileName){<br />
System.Diagnostics.Process process = new System.Diagnostics.Process();<br />
System.Diagnostics.ProcessStartInfo pStart = new System.Diagnostics.ProcessStartInfo();		   <br />
							pStart.FileName = @"C:\Program Files\Windows NT\Accessories\wordpad.exe";<br />
//MessageBox.Show(FileName);<br />
   /* the following text contains the problen when i try too send FileName as a CommandLine Arg. The problem is because FileName Possible contains space's so WordPad Stops at the first space that it see's How can i send the arg as a full string.?*/<br />
   pStart.Arguments = Path.GetFullPath(FileName);		  <br />
   process.StartInfo = pStart;<br />
   process.Start();  <br />
   Application.Exit();<br />
}<br />

UnicodeEncoding encoding = new UnicodeEncoding();
byte[] hashBytes = encoding.GetBytes( mystringpassword );

// compute SHA-1 hash.
SHA1 sha1 = new SHA1CryptoServiceProvider();
byte[] cryptPassword = sha1.ComputeHash ( hashBytes );

return cryptPassword;