public static bool ToTimeSpanLegacy( [NotNull] string str, out TimeSpan result ) {
if( str == null ) throw new ArgumentNullException( "str" );
if( str.Length > 1 ) {
result = new TimeSpan( Int64.Parse( str ) * TicksPerMillisecond );
return true;
} else {
result = TimeSpan.Zero;
return false;
}
}