ISBN Validation

This is what I've been using to validate ISBNs before saving to a data-source in the Open School Library project.

Limitations

Currently there are a few imposed limitations on these methods.

• ISBNs must be passed as strings.
• Though they only accept strings the contents of those strings can only be numbers or they will return false.
• ISBN 13s can only start with 978.
  • I'm aware that 979 exists but haven't updated the code just yet.

Usage

Make a reference to the DLL in your project.

Define a using statement

usingIsbnValidation;

Create a boolean to use.

varisbnIsValid=Validate.ISBN10(isbnStringToValidate);