>>>But I found (actually, David replied in my e-mail) that I can use properties of this anonymous type.
>>>So, looks like I can simply use code like this
>>>
>>>

>>>foreach (var row in resultingQuery)
>>>                     {
>>>                        DataRow newRow = dtReturn.NewRow();
>>>
>>>                        newRow["resource1"] = row.resource1;
>>>                        newRow["fname"] = row.fname;
>>>
>>>                        dtReturn.Rows.Add(newRow);
>>>                     }
>>>

>>>
>>>Wondering if this is easier than David's class or not.
>>
>>That is (according to old ADO.Net book I read) the slowest way to access and you do that in a tight loop across potentially oodles of rows.
>>Faster to get column index in advance or AFAIR fastest back then to query the column in advance (outside loop) and use that inside the loop.
>
>David also suggested that accessing column by index will be faster. I'll see if I can change it.

AFAIR the back then getting the column datatype was even faster integer index, but that might have changed through dotnet versions.