End-to-end testing
similar to system testing; the ‘macro’ end of the test scale; involves testing of a complete application environment in a situation that mimics real-world use, such as interacting with a database, using network communications, or interacting with other hardware, applications, or systems if appropriate.

Sanity testing
typically an initial testing effort to determine if a new software version is performing well enough to accept it for a major testing effort. For example, if the new software is crashing systems every 5 minutes, bogging down systems to a crawl, or
destroying databases, the software may not be in a ’sane’ enough condition to warrant further testing in its current state.

Regression testing
re-testing after fixes or modifications of the software or its environment. It can be difficult to determine how much re-testing is needed, especially near the end of the development cycle. Automated testing tools can be especially useful for this type of testing.

Acceptance testing
final testing based on specifications of the end-user or customer, or based on use by end-users/customers over some limited period of time.

Load testing
testing an application under heavy loads, such as testing of a web site under a range of loads to determine at what point the systems response time degrades or fails.

Stress testing
term often used interchangeably with ‘load’ and ‘performance’ testing. Also used to describe such tests as system functional testing while under unusually heavy loads, heavy repetition of certain actions or inputs, input of large numerical values, large complex queries to a database system, etc.

Performance testing
term often used interchangeably with ’stress’ and ‘load’ testing. Ideally ‘performance’ testing (and any other ‘type’ of testing) is defined in requirements documentation or QA or Test Plans.

Usability testing
testing for ‘user-friendliness’. Clearly this is subjective, and will depend on the targeted end-user or customer. User interviews, surveys, video recording of user sessions, and other techniques can be used. Programmers and testers are usually not appropriate as usability testers.

Install/uninstall testing
testing of full, partial, or upgrade install/uninstall processes.
Recovery testing
testing how well a system recovers from crashes, hardware failures, or other catastrophic problems.

Security testing
testing how well the system protects against unauthorized internal or external access, willful damage, etc; may require sophisticated testing techniques.

Compatibility testing
testing how well software performs in a particular hardware/software/operating system/network/etc. environment.

Exploratory testing
often taken to mean a creative, informal software test that is not based on formal test plans or test cases; testers may be learning the software as they test it.

Ad-hoc testing
similar to exploratory testing, but often taken to mean that the testers have significant understanding of the software before testing it.

User acceptance testing
determining if software is satisfactory to an end-user or customer.

Comparison testing
comparing software weaknesses and strengths to competing products.

Alpha testing
testing of an application when development is nearing completion; minor design changes may still be made as a result of such testing. Typically done by end-users or others, not by programmers or testers.

Beta testing
testing when development and testing are essentially completed and final bugs and problems need to be found before final release. Typically done by end-users or others, not by programmers or testers.

Mutation testing
a method for determining if a set of test data or test cases is useful, by deliberately introducing various code changes (’bugs’) and retesting with the original test data/cases to determine if the ‘bugs’ are detected. Proper implementation requires large computational resources.

public ExTask(string message)
: base(message)
{ }
}
#endregion

==================================================================
To catch the custom Exception :

catch (ExTask ex)
{
// Do to Log Handler
}

==================================================================
For the above example “ExTask” is the custom exception name.

1.your Exception wants to inherit the exception base class.

2.You have to create a default constructor,,,, two method we
wants to call the base class Exception contructor.