use the FileInfo class for the transformation, as follows:

string[] sizes = { "B", "KB", "MB", "GB", "TB" };
double len = new FileInfo(filename).Length;
int order = 0;
while (len >= 1024 && order < sizes.Length - 1) {
    orderPP;
    len = len/1024;
}

string result = String.Format("{0:0.-sharp-sharp} {1}", len, sizes[order]);

ide-an-easy-way-convert-bytes-to-kb-mb-gb-etc" rel=" nofollow noreferrer "> https://stackoverflow.com/que.

you can take a look at this project: https://github.com/Humanizr/H.

var fileSize = (10).Kilobytes();

fileSize.Bits      => 81920
fileSize.Bytes     => 10240
fileSize.Kilobytes => 10
fileSize.Megabytes => 0.009765625
fileSize.Gigabytes => 9.53674316e-6
fileSize.Terabytes => 9.31322575e-9