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C#: Using StringBuilder for Concatnation

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StringBuilder class is a much better way to concatenate strings. Unlike a string object it can be changed as needed, and is much more efficient than using +=

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  1. // This example concatenates using StringBuilder object then writes contents of the 
  2. // StringBuilder object out to a file using streamwriter
  3.  
  4. StringBuilder textSB = new StringBuilder();
  5. string newLine;
  6.  
  7. for(int i = 0; i < 50; i++)
  8. {
  9. 	newLine = "Line # " + i;
  10. 	textSB.Append(newLine).Append("|").Append("\r\n");
  11. }
  12.  
  13. string filePath = @"c:\output.txt";
  14. using (StreamWriter outFile = new StreamWriter(filePath))
  15.     outFile.Write(textSB.ToString());

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