Untitled DocumentFigures

语法比较

托管扩展语法

public __gc __sealed class Student
{
    private:
        double m_grade;
        String* m_name;
    public:
        __property double get_Grade() { return m_grade; }
        __property void set_Grade(double newGrade) { m_grade = newGrade; }

        __property String* get_Name() { return m_name; }
        __property void set_Name(String* newName) { m_name = newName; } 
}

C++/CLI 语法

public ref class Student sealed
{
    private:
        double m_grade;
    public:
        // standard property syntax
        property double Grade
        {
            double get() { return m_grade; }
            void set(double newGrade) { m_grade = newGrade; }
        }

        // trivial property 
        // compiler can generate accessors and backing store
        property String^ Name;
}

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决定性清除

实现	代码
没有决定性清除的C#代码	string ReadFirstLineFromFile(string path) { StreamReader reader = new StreamReader(path); return reader.ReadLine(); })
带有决定性清除的C#代码	string ReadFirstLineFromFile(string path) { using (StreamReader reader = new StreamReader(path)) { return reader.ReadLine(); } }
带有决定性清除的Visual Basic .NET代码	Function ReadFirstLineFromFile( _ ByVal path As String) As String Dim reader As StreamReader Try reader = New StreamReader(path) ReadFirstLineFromFile = reader.ReadLine() Finally If Not reader Is Nothing Then _ CType(reader, IDisposable).Dispose() End Try End Function
带有决定性清除的C++代码	String^ ReadFirstLineFromFile(String^ path) { StreamReader reader(path); return reader.ReadLine(); }

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