/// <summary>
/// Checks for an available update.
/// </summary>
/// <returns>
/// A <see cref="ProgramVersion"/> representing the available update,
/// or <value>nul</value> if no update is available.
/// </returns>
private ProgramVersion?GetUpdate()
{
if (UpdateSource.RequiresConnectivity && !GetConnectivity())
{
return(null);
}
LatestVersion = UpdateSource.GetLatestVersion(AllowPrerelease);
if (LatestVersion == null)
{
return(null);
}
if (LatestVersion.Value.VersionNumber > CurrentVersion)
{
return(LatestVersion);
}
return(null);
}
