What is the base class for all exceptions in C#?

The System.SystemException class is the base class for all predefined system exceptions. Some exception classes derived from System.Exception class are System.ApplicationException and System.SystemException classes.

The System.ApplicationException class supports application-generated exceptions. Therefore, programmer-defined exceptions should be derived from this class.

The following are the exceptions under the base class System.SystemException:

Sr.No.	Exception class and description
1	System.IO.IOException Handle I/O errors.
2	System.IndexOutOfRangeException Handles errors when a method reference exceeds the array index range.
3	System.ArrayTypeMismatchException Handles errors where the type does not match the array type.
4	System.NullReferenceException Handles errors caused by referencing null objects.
5	System.DivideByZeroException Handles errors caused by dividing the dividend by zero.
6	System.InvalidCastException Error thrown during handling of type conversion.
7	System.OutOfMemoryException Handle errors caused by insufficient memory.
8	System.StackOverflowException Handle errors caused by stack overflow.

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