>>>>>>>Hi Viv,
>>>>>>>
>>>>>>>If I change definition of the TableSchema class to be
>>>>>>>

>>>>>>>public class TableSchema 
>>>>>>>{
>>>>>>>
>>>>>>>internal String TableName;
>>>>>>>
>>>>>>>public List<ColumnSchema> Columns = new List<ColumnSchema>();
>>>>>>>
>>>>>>>}
>>>>>>>

>>>>>>>then how would I retrieve column schema for particular column name ?
>>>>>>
>>>>>>

var columnSchema = Columns.Where(x => x.ColumnName == "Name").FirstOrDefault();

>>>>>
>>>>>Good idea! So, you think it's better than using dictionary, right?
>>>>>
>>>>>If so, I'll try to change to your code and use a List.
>>>>
>>>>Don't see much point in a Dictionary here. And IEnumerable might be better the List....
>>>
>>>In our conversion we mostly use Dictionary. I think it's done mostly because of our ignorance and not enough knowledge to use Linq that way you showed.
>>>
>>>I am going to try using list for this particular class and see if there will be a speed benefit.
>>>
>>>One quick question - how should I access individual properties of the columnSchema using the code you showed? Say, I need to get column's DbType?
>>
>>If it's just the one property:

var dbType = Columns.FirstOrDefault(x => x.ColumnName == "Name").DbType;

>
>BTW, I am getting an error that generic list does not contain Where extension method. Which using I am missing?

A reference to System.Linq?

BTW, the last line I sent could throw a NullReferenceException if you use an invalid ColumnName......