Chapter 13 Quick Reference
To Do this
Write a destructor
Write a method whose name is the same as the name of the class
and is prefixed with a tilde (~). The method must not have an access
modifier (such as public) and cannot have any parameters or return
a value. For example:
class Example
{
~Example()
{
...
}
}
Call a destructor You can't call a destructor. Only the garbage collector can call a
destructor.
Force garbage
collection Call System.GC.Collect.
Release a resource at
a known point in
time
Write a disposal method (a method that disposes of a resource) and
call it explicitly from the program. For example:
class TextReader
{
...
public virtual void Close()
{
...
}
}
class Example
{
void Use()
{
TextReader reader = ...;
// use reader
reader.Close();
}
}
To Do this
Release a resource at
a known point in
time in an
exception-safe
manner
Release the resource with a using statement. For example:
class TextReader : IDisposable
{
...
public virtual void Dispose()
{
// calls Close
}
public virtual void Close()
{
...
}
}
class Example
{
void Use()
{
using (TextReader reader = ...)
{
// use reader
}
}
}
