CRV2 FrameworkSpecIssuesASPNetUnsafeCode - Revision history

Johanna Curiel at 18:39, 1 July 2013

2013-07-01T18:39:38Z

Johanna Curiel at 18:33, 1 July 2013

2013-07-01T18:33:54Z

Johanna Curiel at 18:33, 1 July 2013

2013-07-01T18:33:38Z

Johanna Curiel: Created page with "= C# Unsafe Code= Even though C# has a strong memory management infrastructure, there will be times when is necessary to direct access memory: *Dealing with existing structure..."

2013-07-01T18:33:14Z

Created page with "= C# Unsafe Code= Even though C# has a strong memory management infrastructure, there will be times when is necessary to direct access memory: *Dealing with existing structure..."

New page

= C# Unsafe Code=
Even though C# has a strong memory management infrastructure, there will be times when is necessary to direct access memory:
*Dealing with existing structures on disk
*Advanced COM or Platform Invoke scenarios that involve structures with pointers in them
*Performance-critical code (Microsoft, 2009)

Microsoft strongly discourages the use of the unsafe code when this is not necessary. It is clear that even when using unsafe code might improve performance in the program, the risks might overcome the benefits. Definitely, this is no area for inexperienced programmers.

Unsafe is used by declaring the “unsafe” keyword in the program code. For example:

class UnsafeTest
{
// Unsafe method: takes pointer to int:
unsafe static void SquarePtrParam(int* p)
{
*p *= *p;
}

unsafe static void Main()
{
int i = 5;
// Unsafe method: uses address-of operator (&):
SquarePtrParam(&i);
Console.WriteLine(i);
}
}
// Output: 25

==References==
Microsoft, 2009 , Unsafe Code , available athttp://msdn.microsoft.com/en-us/library/aa288474%28v=VS.71%29.aspx (accessed on 01-07-2013)

@@ Line 24: / Line 24: @@
+  }
   // Output: 25
 ==References==
 Microsoft, 2009 , Unsafe Code , available athttp://msdn.microsoft.com/en-us/library/aa288474%28v=VS.71%29.aspx (accessed on 01-07-2013)

@@ Line 9: / Line 9: @@
 Unsafe is used by declaring the “unsafe” keyword in the program code. For example:
-  class UnsafeTest
+  class UnsafeTest {
     // Unsafe method: takes pointer to int:
     unsafe static void SquarePtrParam(int* p)

@@ Line 16: / Line 16: @@
        *p *= *p;
+    }
     unsafe static void Main()
+    {