Class ReportDocumentUtils

Secure report document path resolution:

Accepts only known report extensions (extension gate applied before any filesystem access).
Normalizes paths (slashes, trimming, collapse of redundant leading UNC backslashes) for consistent comparison.
When validation is enabled, enforces containment within a configured base directory (or allowed UNC host/share root) using boundary-aware checks.
Rejects traversal attempts that escape containment and any use of reparse points (junctions, symlinks) inside the base path to prevent directory indirection.
Applies an optional UNC host/share allow-list on Windows before performing existence checks to avoid unintended network calls.
Centralizes the existence check after candidate path resolution; candidate helpers never access the filesystem directly.
Fails closed (returns null) on normalization or IO exceptions.

System.Object

ReportDocumentUtils

public static class ReportDocumentUtils

public static bool IsSupportedReportDocument(string path)

System.String path

System.Boolean