Generate version ID

GenerateVersionId.cs

private static string GenerateVersionId(Guid extensionId, string version, string? targetPlatform)
{
    StringBuilder builder = new();

    builder.Append(extensionId.ToString("D")); // use default string format
    builder.Append('|'); // extension ID cannot contain '|'
    builder.Append(version.ToLowerInvariant()); // SQL collation is case insensitive

    if (targetPlatform is not null)
    {
        builder.Append('|'); // version cannot contain '|'
        builder.Append(targetPlatform.ToLowerInvariant()); // SQL collation is case insensitive
    }

    // if future non-null fields are added, a '|' should be added for target platform

    byte[] input = Encoding.UTF8.GetBytes(builder.ToString());
    byte[] hash = SHA256.HashData(input); // SHA-256 because input is user provided, and because Kusto hash_sha256 exists

    return Convert.ToHexString(hash).ToLowerInvariant(); // lowercase to be consistent with CDN URL casing (and less yelling)
}