📅 最后修改于: 2020-10-31 04:08:17 🧑 作者: Mango
SystemException是C＃中预定义的异常类。它用于处理系统相关的异常。它用作系统异常名称空间的基类。它具有各种子类，例如：ValidationException，ArgumentException，ArithmeticException，DataException，StackOverflowException等。
它由我们在下面列出的丰富的构造函数，属性和方法组成。
[SerializableAttribute]
[ComVisibleAttribute(true)]
public class SystemException : Exception
| Constructors | Description |
|---|---|
| SystemException() | It is used to initialize a new instance of the SystemException class. |
| SystemException(SerializationInfo,StreamingContext) | It is used to initialize a new instance of the SystemException class with serialized data. |
| SystemException(String) | It is used to initialize a new instance of the SystemException class with a specified error message. |
| SystemException(String,Exception) | It is used to initialize a new instance of the SystemException class with a specified error message and a reference to the inner exception that is the cause of this exception. |
| Property | Description |
|---|---|
| Data | It is used to get a collection of key/value pairs that provide additional user-defined information about the exception. |
| HelpLink | It is used to get or set a link to the help file associated with this exception. |
| HResult | It is used to get or set HRESULT, a coded numerical value that is assigned to a specific exception. |
| InnerException | It is used to get the Exception instance that caused the current exception. |
| Message | It is used to get a message that describes the current exception. |
| Source | It is used to get or set the name of the application that causes the error. |
| StackTrace | It is used to get a string representation of the immediate frames on the call stack. |
| TargetSite | It is used to get the method that throws the current exception. |
| Method | Description |
|---|---|
| Equals(Object) | It is used to check that the specified object is equal to the current object or not. |
| Finalize() | It is used to free resources and perform cleanup operations. |
| GetBaseException() | It is used to get root exception. |
| GetHashCode() | It is used to get hash code. |
| GetObjectData(SerializationInfo,StreamingContext) | It is used to get object data. |
| GetType() | It is used to get the runtime type of the current instance. |
| MemberwiseClone() | It is used to create a shallow copy of the current Object. |
| ToString() | It is used to create and return a string representation of the current exception. |
此类可用于处理子类的异常。在此，在下面的程序中，程序将引发IndexOutOfRangeException，它是SystemException类的子类。
using System;
namespace CSharpProgram
{
class Program
{
static void Main(string[] args)
{
try
{
int[] arr = new int[5];
arr[10] = 25;
}
catch (SystemException e)
{
Console.WriteLine(e);
}
}
}
}
输出：
System.IndexOutOfRangeException：索引超出数组的范围。