true if the session identifier is valid; otherwise, false.
This method is not intended to be called from application code.
The SessionIDManager.Validate(string) method verifies that the supplied id is a 24-character string consisting of lowercase characters from a to z and numbers from 0 to 5 and that the maximum length of the session ID does not exceed 80 characters.
The SessionIDManager.GetSessionID(System.Web.HttpContext) method calls the SessionIDManager.Validate(string) method when retrieving a session identifier from an HTTP request, to ensure that the supplied session identifier is properly formatted.