Get Month Name from Month Number or vice versa

We need a query to display month name and we have month number for that. Then firstly we create a switch case statement of if else statement for that. But we can get that easily by using the below code ..

int iMonthNo = 3; 
DateTime dtDate = new DateTime(2000, iMonthNo, 1); 
string sMonthName = dtDate.ToString("MMM"); 
string sMonthFullName = dtDate.ToString("MMMM"); 

And as well as if we have full name or half name of month and want to get month number, then we can use the code below ..

string sMonthName = "Jan"; 
sMonthName = "January"; 
int iMonthNo = Convert.ToDateTime("01-" + sMonthName + "-2011").Month; 

This is an optimized process for that in place of conditional statements..