怎样在 Visual C# .NET 中跟踪和调试(2)

Debug Information-Product Starting
The product name is Widget
The available units on hand are100
The per unit cost is 1.03
System.Xml.XmlDocument
Field: The product name is Widget
Field: The units on hand are100
Field: The per unit cost is1.03
Calc: Total Cost is 103
This message WILL appear
---- DEBUG ASSERTION FAILED ----
---- Assert Short Message ----
Message will appear since dUnitcost < 1 is false
---- Assert Long Message ----
at Class1.Main(String[] args) \class1.cs(34)
The product name is Widget
The available units on hand are100
The per unit cost is 1.03
Debug Information-Product Ending
Trace Information-Product Starting
The product name is Widget
Field: The product name isWidget
This message WILL appear
Trace Information-Product Ending

The product name is Widget
The available units on hand are 100
The per unit cost is 1.03
Debug Information-Product Ending
Trace Information-Product Starting
The product name is Widget
Field: The product name is Widget
This message WILL appear
Trace Information-Product Ending

using System; 
using System.Diagnostics; 
class Class1
{
[STAThread]
static void Main(string[] args)
{
string sProdName = "Widget"; 
int iUnitQty = 100; 
double dUnitCost = 1.03; 
Debug.WriteLine("Debug Information-Product Starting "); 
Debug.Indent(); 
Debug.WriteLine("The product name is "+sProdName); 
Debug.WriteLine("The available units on hand are"+iUnitQty.ToString()); 
Debug.WriteLine("The per unit cost is "+ dUnitCost.ToString()); 
System.Xml.XmlDocument oxml = new System.Xml.XmlDocument(); 
Debug.WriteLine(oxml); 
Debug.WriteLine("The product name is "+sProdName,"Field"); 
Debug.WriteLine("The units on hand are"+iUnitQty,"Field"); 
Debug.WriteLine("The per unit cost is"+dUnitCost.ToString(),"Field"); 
Debug.WriteLine("Total Cost is "+(iUnitQty * dUnitCost),"Calc"); 
Debug.WriteLineIf(iUnitQty > 50, "This message WILL appear"); 
Debug.WriteLineIf(iUnitQty < 50, "This message will NOT appear"); 
Debug.Assert(dUnitCost > 1, "Message will NOT appear"); 
Debug.Assert(dUnitCost < 1, "Message will appear since dUnitcost < 1 is false"); 
TextWriterTraceListener tr1 = new TextWriterTraceListener(System.Console.Out); 
Debug.Listeners.Add(tr1); 
TextWriterTraceListener tr2 = new TextWriterTraceListener(System.IO.File.CreateText("Output.txt")); 
Debug.Listeners.Add(tr2); 
Debug.WriteLine("The product name is "+sProdName); 
Debug.WriteLine("The available units on hand are"+iUnitQty); 
Debug.WriteLine("The per unit cost is "+dUnitCost); 
Debug.Unindent(); 
Debug.WriteLine("Debug Information-Product Ending"); 
Debug.Flush(); 
Trace.WriteLine("Trace Information-Product Starting "); 
Trace.Indent(); 
Trace.WriteLine("The product name is "+sProdName); 
Trace.WriteLine("The product name is"+sProdName,"Field" ); 
Trace.WriteLineIf(iUnitQty > 50, "This message WILL appear"); 
Trace.Assert(dUnitCost > 1, "Message will NOT appear"); 
Trace.Unindent(); 
Trace.WriteLine("Trace Information-Product Ending"); 
Trace.Flush(); 
Console.ReadLine(); 
}
}