asp.net - C# sometimes currency format does not work -

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It looks like sometimes the currency format does not work: 

  string amount = "11123.45"; Literal2.Text = string.Format ("{0: c}", zodiac);     
   
 
  
 
 
 This code will never work - because the amount is a string, there is no number. The currency format is only applicable to  number .  
 For example:  
  decimal amount = 11123.45m; Console.lightline (string format ("{0: c}", volume);  
 
 (Note that using  dual  for currencies is almost always a bad The idea is, as it can not represent double equal decimal numbers, there is a more appropriate type of decimal financial data.)

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