.Net Tips , C# Tip : Check file contents is changed using calculateand comparing hash code of a file

[Jayesh Sorathia]

Hash code of a file is useful for check that file contents is changed over the time or not.
First time you calculate hash code of a file and store , after some time period you again calculate hash code of a file and compare with stored hash code, If hash code is changed that means contents of the file is changed.

You can create a cryptographic hash code of the file using the ComputeHash method of the System.Security.Cryptography.HashAlgorithm class.

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[Arne Vajhøj]

Hash code of a file is useful for check that file contents is changed over the time or not.
First time you calculate hash code of a file and store , after some time period you again calculate hash code of a file and compare with stored hash code, If hash code is changed that means contents of the file is changed.

You can create a cryptographic hash code of the file using the ComputeHash method of the System.Security.Cryptography.HashAlgorithm class.

To view full article visit this link.

Response.Write is still not good ASP.NET.

And both MD-5 and SHA-1 are obsolete today.

Arne