public bool Equals(ColumnBasedMappingBase other)
 {
     if (ReferenceEquals(null, other)) return false;
     if (ReferenceEquals(this, other)) return true;
     return other.columns.ContentEquals(columns) &&
         Equals(other.attributes, attributes);
 }
 public bool Equals(ColumnBasedMappingBase other)
 {
     if (ReferenceEquals(null, other))
     {
         return(false);
     }
     if (ReferenceEquals(this, other))
     {
         return(true);
     }
     return(other.columns.ContentEquals(columns) &&
            Equals(other.attributes, attributes));
 }