The title says it all:

 1. I read in a tar.gz archive like so 
 2. break the file into an array of bytes
 3. Convert those bytes into a Base64 string
 4. Convert that Base64 string back into an array of bytes
 5. Write those bytes back into a new tar.gz file

I can confirm that both files are the same size (the below method returns true) but I can no longer extract the copy version.

Am I missing something?

    Boolean MyMethod(){
        using (StreamReader sr = new StreamReader(&quot;C:\...\file.tar.gz&quot;)) {
            String AsString = sr.ReadToEnd();
            byte[] AsBytes = new byte[AsString.Length];
            Buffer.BlockCopy(AsString.ToCharArray(), 0, AsBytes, 0, AsBytes.Length);
            String AsBase64String = Convert.ToBase64String(AsBytes);

            byte[] tempBytes = Convert.FromBase64String(AsBase64String);
            File.WriteAllBytes(@&quot;C:\...\file_copy.tar.gz&quot;, tempBytes);
        }
        FileInfo orig = new FileInfo(&quot;C:\...\file.tar.gz&quot;);
        FileInfo copy = new FileInfo(&quot;C:\...\file_copy.tar.gz&quot;);
        // Confirm that both original and copy file have the same number of bytes
        return (orig.Length) == (copy.Length);
    }

EDIT: The working example is much simpler (Thanks to @T.S.):

    Boolean MyMethod(){
        byte[] AsBytes = File.ReadAllBytes(@&quot;C:\...\file.tar.gz&quot;);
        String AsBase64String = Convert.ToBase64String(AsBytes);

        byte[] tempBytes = Convert.FromBase64String(AsBase64String);
        File.WriteAllBytes(@&quot;C:\...\file_copy.tar.gz&quot;, tempBytes);

        FileInfo orig = new FileInfo(@&quot;C:\...\file.tar.gz&quot;);
        FileInfo copy = new FileInfo(@&quot;C:\...\file_copy.tar.gz&quot;);
        // Confirm that both original and copy file have the same number of bytes
        return (orig.Length) == (copy.Length);
    }

Thanks!

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Converting file into Base64String and back again