Retrieve a field value

Hi,
I want to retrieve a field value from a dataset in C# 2008
does anybody know how can I do it?
I know below method but it does not make sence to me, I am sure there is a command for it

Thank you in Advance
Alex_00

//foreach (DataRow dtr in DataSetPicker_Obj.Tables[0].Rows)

//{

// foreach (DataColumn c in DataSetPicker_Obj.Tables[0].Columns)

// {

// MessageBox.Show(dtr[c.ColumnName].ToString() + " <|>" + c.ColumnName.ToString());

// }

//}

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