1、自定义异常类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace ExceptionApp
{public class CustomException:Exception{//默认构造函数public CustomException():base() { }//接收错误信息的构造函数public CustomException(string message) : base(message) { }//同时接收错误信息和内部异常的构造函数public CustomException(string message,Exception inner) : base(message,inner) { }//添加额外的属性或方法以适应特定的需求public string AdditionalInfo { get; set; }//按需要传递信息public CustomException(string message,string additionalInfo) : base(message) { AdditionalInfo = additionalInfo;}}
}

2、默认自定义异常

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace ExceptionApp
{internal class Program{static void Main(string[] args){try{//默认自定义异常throw new CustomException();}catch (CustomException ex){Console.WriteLine($"Message:{ex.Message},AdditionalInfo:{ex.AdditionalInfo}");}finally { Console.ReadLine(); }}}
}

3、接收错误信息的自定义异常

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace ExceptionApp
{internal class Program{static void Main(string[] args){try{//接收错误信息的自定义异常throw new CustomException("自定义异常信息");}catch (CustomException ex){Console.WriteLine($"Message:{ex.Message},AdditionalInfo:{ex.AdditionalInfo}");}finally { Console.ReadLine(); }}}
}

4、同时接收错误信息和内部异常的自定义异常

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace ExceptionApp
{internal class Program{static void Main(string[] args){try{//默认自定义异常//同时接收错误信息和内部异常的自定义异常throw new CustomException("自定义异常", new DivideByZeroException());}catch (CustomException ex){Console.WriteLine($"Message:{ex.Message},AdditionalInfo:{ex.AdditionalInfo}");}finally { Console.ReadLine(); }}}
}

5、按需要传递信息自定义异常

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;namespace ExceptionApp
{internal class Program{static void Main(string[] args){try{//按需要传递信息自定义异常throw new CustomException("自定义异常信息", "505");}catch (CustomException ex){Console.WriteLine($"Message:{ex.Message},AdditionalInfo:{ex.AdditionalInfo}");}finally { Console.ReadLine(); }}}
}