Check to see if a column exists in a datareader

DatabaseExtensions

public static bool HasColumn(this IDataRecord dr, string columnName)
{
    for (int i = 0; i < dr.FieldCount; i++)
    {
      if (dr.GetName(i).Equals(columnName, StringComparison.InvariantCultureIgnoreCase)) return true;
    }
  
    return false;
}