DocumentSHA1ContentHash Property

[DataMemberAttribute]
public string SHA1ContentHash { get; set; }

Property Value

For Office 97-2003 documents that have complementary hashes, the complementary hash is the hash of the document's primary compound document stream (e.g., for Word 97-2003 it is the hash of the "WordDocument" compound file stream). For emails, it is a hash of extracted text with some caveats.

Reference