Spliting the string with any word

In C#
For Example -
String str="c//Programfile//abc//xyz";

string [] strsql=str.split('//');
strsql[0]="C";
strsql[1]="Programfile";
strsql[2]="abc";
strsql[3]="xyz";

if u want to get the value of the last array element .
string lastelement= strsql[strsql.length-1];