August 2003
Intermediate to advanced
928 pages
32h 1m
English
Missing
Because C# (as well as some other languages)
does not allow optional parameters,
Missing allows those languages to pass this value
to indicate that a value will not be specified for those optional
parameters. The only way to access an instance of this
class—there can only be one—is by the return value of the
static field, called Value.
public sealed class Missing { // Public Static Fields public static readonly Missing Value; // =System.Reflection.Missing }