hash.cs

public string HashSecret(string secret) {
  using var sha256 = SHA256.Create();
            
  // Compute hash of the password
  var hashBytes = sha256.ComputeHash(Encoding.UTF8.GetBytes(secret));

  // Convert byte array to a hexadecimal string
  var builder = new StringBuilder();
  foreach (var t in hashBytes) {
    builder.Append(t.ToString("x2"));
  }

  return builder.ToString();
}

Test hash: 473287f8298dba7163a897908958f7c0eae733e25d2e027992ea2edc9bed2fa8