Implicit conversion from varchar to varbinary not allowed

Question

update TBL_PRODUCTDETAILS Set Picfront='System.Byte[]' where ID ='2147'

 

Msg 257, Level 16, State 3, Line 1

Implicit conversion from data type varchar to varbinary(max) is not allowed. Use the CONVERT function to run this query.

 

 

how to convert this query