vb.net - Changing Unicode character to string -

I have to follow the string:

  string = "user̲upload "  
 I want to convert Unicode character @ 0332 to underscore. I have the following code for it:  
  Slow examination in the form of new text. Stingerbuilder Test. Append (text. Replace ("@ 0332", "_")) string = test as normalized URL. ToString ()   
 Although this is not working, my "test" string has the same value as the "text" variable. Anyone has an idea of ​​what could be wrong?   
 
 
 You can;  
  Text. Change (variable (and h 332), "_")