Dev2.PathOperations.Dev2ActivityIOBroker.ValidateSourceAndDestinationPaths C# (CSharp) Method

        void ValidateSourceAndDestinationPaths(IActivityIOOperationsEndPoint src,
                                                       IActivityIOOperationsEndPoint dst)
        {
            if(src.IOPath.Path.Trim().Length == 0)
            {
                throw new Exception("Source can not be an empty string");
            }

            var sourceParts = src.IOPath.Path.Split(src.PathSeperator().ToCharArray(),
                                                       StringSplitOptions.RemoveEmptyEntries).ToList();

            if(dst.IOPath.Path.Trim().Length == 0)
            {
                dst.IOPath.Path = src.IOPath.Path;
            }
            else
            {
                if(!Path.IsPathRooted(dst.IOPath.Path) && IsNotFtpTypePath(dst.IOPath) && IsUncFileTypePath(dst.IOPath))
                {

                    var lastPart = sourceParts.Last();

                    dst.IOPath.Path =
                        Path.Combine(src.PathIs(dst.IOPath) == enPathType.Directory
                                         ? src.IOPath.Path
                                         : src.IOPath.Path.Replace(lastPart, ""), dst.IOPath.Path);
                }
            }

            var destinationParts = dst.IOPath.Path.Split(dst.PathSeperator().ToCharArray(),
                                                       StringSplitOptions.RemoveEmptyEntries).ToList();

            while(destinationParts.Count > sourceParts.Count)
            {
                destinationParts.Remove(destinationParts.Last());
            }

            if(destinationParts.OrderBy(i => i).SequenceEqual(
                 sourceParts.OrderBy(i => i)))
            {
                throw new Exception("Destination directory can not be a child of the source directory");
            }
        }