C#访问非托管内存

示例1：分配一个新的内存地址给新变量

Point p;

// Initialize unmanged memory to hold the struct.

IntPtr pnt = Marshal.AllocHGlobal(Marshal.SizeOf(p));

// Copy the struct to unmanaged memory.

Marshal.StructureToPtr(p, pnt, false);

// Create another point.

Point anotherP;

// Set this Point to the value of the

// Point in unmanaged memory.

anotherP = (Point)Marshal.PtrToStructure(pnt, typeof(Point));

Marshal.FreeHGlobal(pnt);

示例2：将一个字符串地址转换为字符串，以及获取字符串的地址：

IntPtr lpFileName;

string filename = Marshal.PtrToStringUni(lpFileName);

lpFileName = Marshal.StringToHGlobalUni(filename);