Why would "Drop Database" fail on local SQL Server 2005 Express instance? I am trying to run the below code. It works for me but not for at least some of my users it doesn't work. It doesn't seem to error just no actually remove the DB's.

string sqlConnectionString=@"Data Source=.\SQLEXPRESS;Initial Catalog=master;Integrated Security=True";
var theSQL="DROP DATABASE DBName1, DBName2, DBName3, DBName4";
SqlConnection conn=new SqlConnection(sqlConnectionString);
Server server=new Server(new ServerConnection(conn));

server.ConnectionContext.ExecuteNonQuery(theSQL);


Alternatively, what I really need is to remove the existing Replication Sets on those DB's so that I can setup the new ones. We moved to a new SQL Server but the database names are the same.


  The subscription could not be initialized using an initial snapshot
  because one or more tables in the subscription belong to another
  publication, and therefore cannot be dropped. Consider initializing
  the subscription manually without using a snapshot.


Error they receive, though this would be after the above was supposed to run as this is during the Sync that happens next.
Depending on whether or not these are subscriptions or the published database you are going to need to drop the replication data. 

MS Published a handy doc with example scripts here http://support.microsoft.com/kb/324401

This one is a general tool to clear out what you need

sp_removedbreplication '&lt;Database name&gt;'