/// <summary>
/// Gets the value for a column name.
/// </summary>
/// <exception cref="KeyNotFoundException">Column was not available.</exception>
public object GetValue(string columnName)
{
int ordinal;
if (!_columns.TryGetValue(columnName, out ordinal))
{
throw new KeyNotFoundException(columnName + " is not available.");
}
return(_values[ordinal]);
}
