Text-base hexadecimal viewer of the content of a Stream for C#

StreamHexDumper.cs

static string DumpStreamToHexString(Stream stream, long startPosition, int length)
{
    const int BytesPerRow = 0x10;
    const char horizontalBar = '─'; // or '|' for non-Unicode terminals
    const char verticalBar = '│'; // or '-' for non-Unicode terminals
    const char crossBar = '┼'; // or '|' for non-Unicode terminals

    byte[] buffer = new byte[length];
    int read = stream.Read(buffer);

    var content = new StringBuilder();
    var textLineBuilder = new StringBuilder();

    // Header
    content.AppendFormat("Offset   {0} ", verticalBar);
    for (int i = 0; i < BytesPerRow; i++) {
        content.AppendFormat("{0:X2} ", i);
    }

    content.AppendFormat("{0} ASCII\n", verticalBar);
    content.Append(new string(horizontalBar, 9));
    content.Append(crossBar);
    content.Append(new string(horizontalBar, 1 + (BytesPerRow * 3)));
    content.Append(crossBar);
    content.AppendLine(new string(horizontalBar, 1 + (BytesPerRow * 2)));

    // For each line: offset, hex content and text content
    content.AppendFormat("{0:X8} {1} ", startPosition, verticalBar);
    for (int i = 0; i < read; i++) {
        char ch = (buffer[i] >= 0x21 && buffer[i] <= 0x7F) ? (char)buffer[i] : '.';
        textLineBuilder.AppendFormat("{0} ", ch);

        if (i != 0 && ((i + 1) % BytesPerRow == 0)) {
            content.AppendFormat("{0:X2} {2} {1}\n", buffer[i], textLineBuilder.ToString(), verticalBar);
            content.AppendFormat("{0:X8} {1} ", startPosition + (i + 1), verticalBar);
            textLineBuilder.Clear();
        } else {
            content.AppendFormat("{0:X2} ", buffer[i]);
        }
    }

    return content.ToString();
}


// Create a test Stream
byte[] randomData = new byte[1024];
Random.Shared.NextBytes(randomData);

// Show the content via console
string hexDump = DumpStreamToHexString(stream, 0, (int)stream.Length);
Console.WriteLine(hexDump);

// Output:
// Offset   | 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F | ASCII
// ---------------------------------------------------------------------------------------------
// 00000000 | D6 3D A6 D7 ED 24 C1 35 10 11 5A 3D 29 49 FC AE | . = . . . $ . 5 . . Z = ) I . . 
// 00000010 | 94 93 B6 37 8B 23 B0 68 78 54 70 DE D4 9A 0F 2C | . . . 7 . # . h x T p . . . . ,