1012-1016: LGTM! Conditional directive now matches the codebase pattern.

The change from NET5_0_OR_GREATER to NETCOREAPP2_1_OR_GREATER || NETSTANDARD2_1 aligns with the file-level conditional at line 2 and enables span-based optimization on a broader set of target frameworks where AsSpan is available.

1024-1028: LGTM! Consistent conditional directive.

The change correctly applies the same framework conditional as the rest of the file for the 2-digit remainder case.

1033-1037: LGTM! Completes the consistency fix.

The change correctly applies the standardized framework conditional for the 1-digit remainder case, completing the alignment across all three parsing scenarios in PlainTextToBinaryNumeric.