C#

class A {
    ref int m_retParam;     // no no

    A(ref int param) {
        m_retParam=param;
    }

    public void DoSomething(){
        m_retParam = 5; // new value
    }
}

class A {
    public A() {}

    public void DoSomething(ref int m_retParam) { // normal use of ref
        m_retParam = 5; // new value
    }
}

class A {
    public int result;

    public A() {}

    public void DoSomething() {
        result = 5;
    }
}

class A {
    private int result;
    public int Result {get {return result;}}

    public A() {}

    public void DoSomething() {
        result = 5;
    }
}

class B {    // not a struct, we need a reference value
    public int result;

    public B() {}
}

class A {
    private B m_retObject;

    public A(B retObject) {
        m_retObject=retObject;    // remember the reference (think of it as a ptr)
    }

    public void DoSomething() {
        m_retObject.result = 5;
    }
}

<code>
Bitmap bmpOriginal, bmpSection;

bmpOriginal = new Bitmap("C:\\Test.bmp");
bmpSection = bmpOriginal.Clone(new Rectangle(0, 0, 100, 100), bmpOriginal.PixelFormat);
</code>

Supports the Full and Compact .NET Framework as well as native C/C++
The library is 100% binary compatible with the original sqlite3.dll and has no linker dependencies on the .NET runtime for full unmanaged C/C++ development. 

Nader Elshehabi wrote:

One way to check if the Xml file has been modified is to get the hash code of file, last modified attribute, or store the size in bytes in a long. Then make a timer to check if the values has changed let's say every minute.