Firstly you must, use the Windows calculator to find the hexadecimal representation of 42. It is 2A
Then use the Unicode code syntax '\u00XX' - so it will look like \u002A (escape sequence). Do not forget to put it in single quotes (strings are in double qoutes)!
and then write the code itself:
using System;
class UnicodeCharacter
{
static void Main()
{
char a = '\u002A';
Console.WriteLine(a);
}
}