Microsoft.SqlServer.Replication.dll not found

Hi Everyone,

I have a scenario where I have a publication ready for merge replication. I have also created the Subcribers. 

Now I want to write a small C# application to get my data synchronized using RMO objects.

But unfortunately I am unable to find Microsoft.SqlServer.Replication.dll.

In my server I have SQL Server 2008 R2.

And all my subscriber systems have SQL Server 2008 R2 Express Edition installed.

Now where can I find the Microsoft.SqlServer.Replication.dll

Thanks

Prabhanjan

Prabhanjan Kumar Mahapatra