public void Delete(byte[] streamId, long timestamp)
{
var preparedRemoveDesc = session.Prepare(RemoveActivityStreamQueryTemplateDesc);
var preparedRemoveAsc = session.Prepare(RemoveActivityStreamQueryTemplateAsc);
session
.Execute(preparedRemoveDesc
.Bind(Convert.ToBase64String(streamId), timestamp));
session
.Execute(preparedRemoveAsc
.Bind(Convert.ToBase64String(streamId), timestamp));
}