public void CallRiskyWithinCallRiskys_ThisJustGotUgly()
{
//Sometimes people found they needed the result of one risky operation to create an object for another risky operation
var disposable = new RiskyDisposable();
RiskyDisposable soonToBeCreatedDisposable = null;
try
{
var result = disposable.RiskyMethod();
soonToBeCreatedDisposable = new RiskyDisposable(result);
soonToBeCreatedDisposable.RiskyMethod();
}
catch
{
}
finally
{
disposable.Dispose();
//thanks to null propogation we no longer need the if statement asking if it's null lol
soonToBeCreatedDisposable?.Dispose();
}
Assert.True(disposable.IsDisposed);
if (soonToBeCreatedDisposable != null)
{
Assert.True(soonToBeCreatedDisposable.IsDisposed);
}
}
public void BeholdUsingInPlaceOfFinallies()
{
RiskyDisposable disposable = null;
RiskyDisposable soonToBeCreatedDisposable = null;
try
{
//now even if these throw exceptions they will still dispose no more finallies
using (disposable = new RiskyDisposable())
using (soonToBeCreatedDisposable = new RiskyDisposable(disposable.RiskyMethod()))
soonToBeCreatedDisposable.RiskyMethod();
}
catch
{
}
if (disposable != null)
{
Assert.True(disposable.IsDisposed);
}
if (soonToBeCreatedDisposable != null)
{
Assert.True(soonToBeCreatedDisposable.IsDisposed);
}
}
public void AlsoUsingsLookPrettierWhenDoingNonRiskyThings()
{
using (var disposable = new RiskyDisposable())
disposable.NonRiskyMethod();
//vs
var disposable2 = new RiskyDisposable();
disposable2.NonRiskyMethod();
disposable2.Dispose();
}
public void CallRiskyDisposableWithoutProtection_NotDisposed()
{
//Before if an exception was thrown things might not be cleaned up if you were not being careful
var disposable = new RiskyDisposable();
try
{
disposable.RiskyMethod();
disposable.Dispose();
}
catch
{
}
Assert.False(disposable.IsDisposed);
}
public void CallRiskyDisposableTheOldSafeWay_Disposed()
{
//People solved a way to do it safely though you just had to write a few lines
var disposable = new RiskyDisposable();
try
{
disposable.RiskyMethod();
}
catch
{
}
finally
{
disposable.Dispose();
}
Assert.True(disposable.IsDisposed);
}
