C# 0 The Complete Reference

LastIndexOf( )

 and 

Substring( )

 methods defined by 

string

.

(These are described in Chapter 7. The version of 

Substring( )

 used here returns the substring 

that starts at the specified index and runs to the end of the invoking string.) The index of the 

last period in a website name is found using 

LastIndexOf( )

. Using this index, the 

Substring( )

method obtains the remainder of the string, which is the part of the website name that 

contains the top-level domain name. One other point: Notice the use of the 

where

 clause to 

filter out any strings that don’t contain a period. The 

LastIndexOf( )

 method returns –1 if 

the specified string is not contained in the invoking string.

www.freepdf-books.com

---