The new version adds experimental support for TR-64. There are some major changes going on which will be part of CTP3.

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Easy and clean:

public static DbConnection GetStoreConnection(this ObjectContext oc)
{
    if (oc == null)
        throw new NullReferenceException("oc is null");

    var conn = (EntityConnection)oc.Connection;

    if (conn.State == ConnectionState.Closed)
        conn.Open();

    return conn.StoreConnection;
}