How to Test Anonymous Type Equality - LINQ: A Step Ahead Series

How to Test Anonymous Type Equality - LINQ: A Step Ahead Series

First of all Anonymous Type Equality : If two or more anonymous types have same order, number and member declaratory type amd name then the same anonymous type is defined. So, its permissible to use the referencial equality operator on these types.

Now lets see the other face of the coin means of any of order, number and member declarator type and name is different then different anonymous type is defined for each. Then it throw compiler error while testing referential integrity.


  • Here you can use reflection to get the type information of anonymous types.

  • Use the Equals method (defined by all objects) to test equality of members.

Lets go through following lines :

var paternalMember = new {Father = "R k Arora", City = "Nangal Dam"};
var maternalMember = new {Mother = "Santosh Arora", City = "New Delhi"};

var fatherHome = new {Father = "R k Arora", City = "Nangal Dam"};
var motherHome = new {City = "New Delhi", Mother = "Santosh Arora"};

//Compare member equality:
paternalMember.Equals(fatherHome); //returns true
paternalMember.Equals(fatherHome); //error

If you want to know more about Anonymous Type-LINQ please refer to Anonymous Types in LINQ : A Step Ahead Series

Article by Gaurav Aroraa
Gaurav is a Microsoft Technology Specialist professional. He has awarded lifetime membership from Computer Society of India (CSI). He has more than 13yrs of experience in the industry. Currently, he is working in the capacity of Solution Architect with an MNC. He is serving to the various communities since 1999.

Follow Gaurav Aroraa or read 149 articles authored by Gaurav Aroraa


No responses found. Be the first to comment...

  • Do not include your name, "with regards" etc in the comment. Write detailed comment, relevant to the topic.
  • No HTML formatting and links to other web sites are allowed.
  • This is a strictly moderated site. Absolutely no spam allowed.
  • Name: