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Read a line from console

/* C# Programming Tips & Techniques by Charles Wright, Kris Jamsa Publisher: Osborne/McGraw-Hill (December 28, 2001) ISBN: 0072193794 */ // dbTest.cs -- Sample program to be used with cordbg.exe // //              Compile this program with the following command line: //                  C:>csc /debug:full dbTest.cs // using System; namespace nsDebug {     public class dbTest     {         static public void Main ()         {             double x = 7.0;             while (true)             {                 Console.Write ("\r\nPlease enter a number: ");                 string str = Console.ReadLine ();                 if (str.Length == 0)                     break;                 double val = 0;                 try                 {                     val = Convert.ToDouble (str);                 }                 catch (Exception)                 {                     Console.WriteLine ("\r\nInvalid number");                     continue;                 }                 Console.WriteLine (x + " X " + val + " = {0,0:F6}", val / x);             }         }     } }