Csharp/C Sharp by API/System/Exception

Exception.HelpLink

  
using System; 
 
class MainClass {  
  public static void Main() {  
  
    try {  
        int[] nums = new int[4];  
     
        Console.WriteLine("Before exception is generated."); 
     
        // Generate an index out-of-bounds exception. 
        for(int i=0; i < 10; i++) { 
            nums[i] = i; 
        } 
    }  
    catch (IndexOutOfRangeException exc) {  
      Console.WriteLine("Standard message is: "); 
      Console.WriteLine(exc); // calls ToString() 
      Console.WriteLine("Stack trace: " + exc.StackTrace); 
      Console.WriteLine("Message: " + exc.Message); 
      Console.WriteLine("TargetSite: " + exc.TargetSite); 
      Console.WriteLine("Class defining member: {0}", exc.TargetSite.DeclaringType);
      Console.WriteLine("Member type: {0}", exc.TargetSite.MemberType);
      Console.WriteLine("Source: {0}", exc.Source);
      Console.WriteLine("Help Link: {0}", exc.HelpLink);
      
    }  
    Console.WriteLine("After catch statement.");  
  }  
}

Exception.Source

  
using System; 
 
class MainClass {  
  public static void Main() {  
  
    try {  
        int[] nums = new int[4];  
     
        Console.WriteLine("Before exception is generated."); 
     
        // Generate an index out-of-bounds exception. 
        for(int i=0; i < 10; i++) { 
            nums[i] = i; 
        } 
    }  
    catch (IndexOutOfRangeException exc) {  
      Console.WriteLine("Standard message is: "); 
      Console.WriteLine(exc); // calls ToString() 
      Console.WriteLine("Stack trace: " + exc.StackTrace); 
      Console.WriteLine("Message: " + exc.Message); 
      Console.WriteLine("TargetSite: " + exc.TargetSite); 
      Console.WriteLine("Class defining member: {0}", exc.TargetSite.DeclaringType);
      Console.WriteLine("Member type: {0}", exc.TargetSite.MemberType);
      Console.WriteLine("Source: {0}", exc.Source);
      Console.WriteLine("Help Link: {0}", exc.HelpLink);
      
    }  
    Console.WriteLine("After catch statement.");  
  }  
}

Exception.TargetSite

  
using System; 
 
class MainClass {  
  public static void Main() {  
  
    try {  
        int[] nums = new int[4];  
     
        Console.WriteLine("Before exception is generated."); 
     
        // Generate an index out-of-bounds exception. 
        for(int i=0; i < 10; i++) { 
            nums[i] = i; 
        } 
    }  
    catch (IndexOutOfRangeException exc) {  
      Console.WriteLine("Standard message is: "); 
      Console.WriteLine(exc); // calls ToString() 
      Console.WriteLine("Stack trace: " + exc.StackTrace); 
      Console.WriteLine("Message: " + exc.Message); 
      Console.WriteLine("TargetSite: " + exc.TargetSite); 
      Console.WriteLine("Class defining member: {0}", exc.TargetSite.DeclaringType);
      Console.WriteLine("Member type: {0}", exc.TargetSite.MemberType);
      Console.WriteLine("Source: {0}", exc.Source);
      Console.WriteLine("Help Link: {0}", exc.HelpLink);
      
    }  
    Console.WriteLine("After catch statement.");  
  }  
}

extends Exception

  

using System;
using System.Runtime.Serialization;
[Serializable]
public sealed class MyException : Exception
{
    private string stringInfo;
    private bool booleanInfo;
    public MyException() : base() { }
    public MyException(string message) : base(message) { }
    public MyException(string message, Exception inner): base(message, inner) { }
    private MyException(SerializationInfo info, StreamingContext context) : base(info, context)
    {
        stringInfo = info.GetString("StringInfo");
        booleanInfo = info.GetBoolean("BooleanInfo");
    }
    public MyException(string message, string stringInfo, bool booleanInfo) : this(message)
    {
        this.stringInfo = stringInfo;
        this.booleanInfo = booleanInfo;
    }
    public MyException(string message, Exception inner, string stringInfo, bool booleanInfo): this(message, inner)
    {
        this.stringInfo = stringInfo;
        this.booleanInfo = booleanInfo;
    }
    public string StringInfo
    {
        get { return stringInfo; }
    }
    public bool BooleanInfo
    {
        get { return booleanInfo; }
    }
    public override void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("StringInfo", stringInfo);
        info.AddValue("BooleanInfo", booleanInfo);
        base.GetObjectData(info, context);
    }
    public override string Message
    {
        get
        {
            string message = base.Message;
            if (stringInfo != null)
            {
                message += Environment.NewLine + stringInfo + " = " + booleanInfo;
            }
            return message;
        }
    }
}
public class MainClass
{
    public static void Main()
    {
        try
        {
            throw new MyException("Some error", "SomeCustomMessage", true);
        } 
        catch (MyException ex)
        {
            Console.WriteLine(ex.Message);
            Console.WriteLine(ex.BooleanInfo);
            Console.WriteLine(ex.StringInfo);
        }
    }
}