157 recommendations for writing high-quality code to improve C # programs--Recommendation 51: Types with disposable fields or types that own native resources should be disposable

Recommendation 51: Types with disposable fields or types that own native resources should be disposable

In recommendation 50, we divide the types in C # into ordinary types and non-trivial types that inherit the IDisposable interface. Non-trivial types, in addition to the types that contain those managed resources, themselves contain a field of a non-trivial type.

In the standard dispose mode, we give an example of a non-trivial type: an Anotherresource type. Since Anotherresource is a non-trivial type, if there is a type that combines anotherresource, then he should inherit the IDisposable interface:

    classanothersampleclass:idisposable {PrivateAnotherresource Managedresource =NewAnotherresource (); Private BOOLdisposed =false;  Public voidDispose () {Dispose (true); Gc. SuppressFinalize ( This); }        ~Anothersampleclass () {Dispose (false); }        protected Virtual voidDispose (BOOLdisposing) {            if(disposed) {return; }            if(disposing) {//clean up Managed resources                if(Managedresource! =NULL) {managedresource.dispose (); Managedresource=NULL; }} disposed=true; }         Public voidSamplepublicmethod () {if(disposed) {Throw NewObjectDisposedException ("Anothersampleclass","Anothersampleclass is disposed"); }            //omitted        }    }

Type Anothersampleclass Although it does not contain any explicit unmanaged resources, because it contains a non-trivial type, we still have to implement a standard dispose pattern for it.

In addition, a type has a native resource (that is, an unmanaged resource) and it should inherit the IDisposable interface.

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157 recommendations for writing high-quality code to improve C # programs--Recommendation 51: Types with disposable fields or types that own native resources should be disposable