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// The Rectangle structure contains a reference type member.

public ShapeInfo rectInfo;

public int rectTop, rectLeft, rectBottom, rectRight;

public Rectangle(string info, int top, int left, int bottom, int right)

{

rectInfo = new ShapeInfo(info);

rectTop = top;  rectBottom = bottom;

rectLeft = left; rectRight = right;

}

public void Display()

{

Console.WriteLine("String = {0}, Top = {1}, Bottom = {2}," +

"Left = {3}, Right = {4}",

rectInfo.infoString, rectTop, rectBottom, rectLeft, rectRight);

}

}

At this point, you have contained a reference type within a value type. The million-dollar ques-

tion now becomes, What happens if you assign one Rectangle variable to another? Given what you

already know about value types, you would be correct in assuming that the integer data (which is

indeed a structure) should be an independent entity for each Rectangle variable. But what about

the internal reference type? Will the object’s state be fully copied, or will the reference to that object

be copied? To answer this question, define the following method and invoke it from Main(). Check

out Figure 4-12 for the answer.

static void ValueTypeContainingRefType()

{