Deleting a single document in RavenDB is easy. Deleting several documents is too. Deleting an entire collection of N-documents isn’t supported by default.
Here is a great extension that deletes an entire collection from your RavenDB document store:
/// <summary>
/// Deletes, or 'drops', an entire collection from the datastore, by the specified type.
/// </summary>
public void Drop<T>()
{
// Determine the concrete type of T
Type g = typeof (T);
// Delete the entire collection
CurrentSession.Advanced.DocumentStore.DatabaseCommands.DeleteByIndex("Raven/DocumentsByEntityName",
// ouch, be weary of the 's' suffix here (pluralization thingie)
new IndexQuery { Query = "Tag:" + g.Name + "s" },
allowStale: true
);
}