Csharp/C Sharp by API/System.Diagnostics/Debug

Debug.Assert

<source lang="csharp"> using System; using System.Diagnostics; using System.Collections; using System.Data; using System.Text; public class MainClass{

  public static void Main(){
    Debug.Assert(1 == 0,"Error!","Error: 1 == 0");
  }

}

 </source>

Debug.Fail

<source lang="csharp"> using System; using System.Collections; using System.Diagnostics; class Class1 {

  static void Main(string[] args) {
    Debug.Fail("Fail Message", "An unexpected exception has been thrown.\n\n");
  }

}

 </source>

Debug.Listeners

<source lang="csharp"> // compile with: csc /r:system.dll file_1.cs using System; using System.Diagnostics; class MyClass {

   public MyClass(int i)
   {
       this.i = i;
   }
   
   [Conditional("DEBUG")]
   public void VerifyState()
   {
       Debug.Assert(i == 0, "Bad State");
   }
   
   int i = 0;

} public class DefensiveProgrammingAsserts {

   public static void Main()
   {
       Debug.Listeners.Clear();
       Debug.Listeners.Add(new TextWriterTraceListener(Console.Out));
       MyClass c = new MyClass(1);
       
       c.VerifyState();
   }

}

 </source>

Debug.WriteLine

<source lang="csharp">

1. define DEBUG

using System; using System.Globalization; using System.Diagnostics; class MainClass {

 public static void Main() 
 {
   TextWriterTraceListener tl = new TextWriterTraceListener(Console.Out);
   Debug.Listeners.Add(tl);
   Debug.WriteLine("Starting Main()");
   Debug.Assert(1 == 2, "1==2");
   Debug.WriteLine("Exiting Main()");
 }

}

 </source>