How do you Determine the Size Required by a Value Type on the Stack

Notice that the sizeof operator has a limitation - it can't deal with structs which have reference type fields.

For example, this program won't compile because MyStruct contains a string field:

using System;

struct MyStruct

{

public int MyInt;

public string MyString;

}

class Test

{

unsafe static void Main()

{

Console.WriteLine(sizeof(MyStruct));

}

All you can do in these case is to work out the size manually - a reference needs 4 bytes on a 32-bit system or 8 bytes on a 64-bit system - though the matter is complicated by having to allow for 'padding' between fields as well.