Regarding string.Format in C#

Question

strEmailBody = string.Format(emailBody, position, NoOfPostion, Convert.ToDateTime(HireByDate).ToString("dd'/'MM'/'yyyy"));  ----  this is the code in C#

 

Hi,<BR/><BR/> Following requisition is pending for your approval.<BR/><BR/>To Submit your feedback {0}<BR/>Position : {1}<BR/>No.of Positions : {2} <BR/>Hire by Date : {3}<BR/>

 

I am getting the error as "

Index (zero based) must be greater than or equal to zero and less than the size of the argument list

Kindly resolve as early as possible.