Error: The best overloaded method match for string.ToString has some invalid arguments using C# in ASP.Net

Dear programer,

I have a column named for Deposit_date and isert date from form side is as 01/01/2001

But i want to chnage this date as 01-Jan-2001

here is my code that is not working - 

SELECT * FROM Tabel replace(CONVERT(VARCHAR(15), Deposit_date, 106) AS [DD-MMM-YYYY])