OK, first of all, your ConvertFields() method should be accepting an object (since that's what you're passing it):

ArrayList ConvertField(object theData)
{
  ArrayList result = new ArrayList();
  result.Add(theData);
  return result;
}

~~Bonnie

>I get the compile error when I call the method. Is there something different to do when passing an array as a parameter?
>
>Here's the code I have now:
>

>// server is defined elsewhere and is working just fine. One row is returned in ds
>DataSet ds = server.GetDemoByPk(100);
>
>// Two errors occur on the next line
>ArrayList dso = ConvertField(ds.Tables["Demo"].Rows[0][10]);
>
>// ConvertField is defined in the same class as the above code
>ArrayList ConvertField(byte[] theData)
>{
>  ArrayList result = new ArrayList();
>  return result;
>}
>

>
>Error 1:
>The best overload method match for 'ConvertField(byte[])' has some invalid arguments.
>
>Error 2:
>Argument '1': cannot convert from 'object' to 'byte[]'
>
>I tried casting the field to byte[], then got the following error on the same line:
>An object reference is required for the nonstatic field, method, or property 'ConvertField(byte[])'
>
>>And what line gives you the error message?