public class Upgrader : UpgradeHandler
    {
        /// <summary>
        /// Determines whether this handler can upgrade the assembly
        ///             from the specified version of it.
        /// </summary>
        /// <param name="oldVersion">The old assembly version.</param>
        /// <returns>
        /// <see langword="true"/> if this instance can upgrade 
        ///             from the specified version of an old assembly; 
        ///             otherwise, <see langword="false"/>.
        /// </returns>
        public override bool CanUpgradeFrom(string oldVersion)
        {
            //return oldVersion.StartsWith("3.0.0");
            return true;
        }
    }