I need help figuring out how to convert data that comes in from a SQL Server table column that is set as varBinary(max) into a string in or
It really depends on which encoding was used when you originally converted from string to binary:
byte[] binaryString = (byte[])reader[1];
// if the original encoding was ASCII
string x = Encoding.ASCII.GetString(binaryString);
// if the original encoding was UTF-8
string y = Encoding.UTF8.GetString(binaryString);
// if the original encoding was UTF-16
string z = Encoding.Unicode.GetString(binaryString);
// etc