Event driven

Exception

is represented by classes

ApplicationException

These exceptions are user program-generated

SystemException

These exceptions are generated by Common Language Runtime (CLR

System.Exception

is at the top of the standards’ exceptions hierarchy

System.ArithmeticException

Errors in arithmetic or conversion operation will be thrown in this exception

System.OverflowException

When an overflow occurs in a checked operation

System.ArgumentException

Any invalid argument in a method will be thrown in this exception.

System.ArgumentNullException

If there is an unacceptable argument passed to a method,

System.IndexOutOfRangeException

Throw in this exception when attempting to index an array through an index that is either less than zero or greater than the maximum length of index.

System.OutOfMemoryException

If the available memory becomes too low to accommodate a memory allocation request

System.StackOverflowException

is called when the execution stack is exhausted by having too many pending method calls.

System.FormatException

This exception checks the format of the string or argument if it is invalid

try

This keyword is used to check for the occurrence of any exceptions enclosed to it

catch

This keyword catches the exception that is thrown on the occurrence of exception in a try block

throw

used to throw an exception manually.

finally

This keyword executes a given statement even if the exception is thrown or not thrown.

exception_Object

is an instance of a class derived from the Exception class

new

operator is used to create a new object

Thread

This is a class in C#.net that can be found in the System.Threading namespace

Main Thread

the first thread to be performed in a process

ThreadStart

use to execute the code when the thread started

ThreadStart

delegate represents a method that runs in the Thread class

Unstarted

is created within the Common Language Runtime (CLR) but has not started

Ready

is ready to run and is waiting for the CPU time

Running

is in running mode after invoking its Start method

WaitSleepJoin

is suspended temporarily by invoking either the Sleep method or the monitor’s Wait method.

Started

suspended thread resumes to Started state when the conditions for which is it was suspended are no longer valid.

Blocked

is blocked when it is waiting for a resource or I/O operations

Stopped

A thread has finished its task

CurrentThread

It returns the current thread that is running

IsAlive

It returns a Boolean value indicating the execution status of the recent thread.

IsBackground

It is used to get or set a value that indicates whether the thread is a background thread or not

Name

is used to get or set the name of the thread.

Priority

is used to get or set a value that represents the priority of a thread.

ThreadState

is used to get the value that contains the states of the recent thread.

public void Abort()

It terminates the thread when calling this method and raises ThreadAbortException in the thread

public void Interrupt()

It interrupts the thread that is in the state of WaitSleepJoin.

public void Join()

is used to stop the calling thread until a thread terminates

public static void ResetAbort()

It is used to withdraw an abort request for the ongoing thread.

public void Start()

It is used to start a thread

public static void Sleep()

It is used to pause a thread for the stated number in milliseconds.

Multithreading

is a common feature that allows your application to have more than one (1) execution path at the same time