Csharp/C Sharp by API/System.Runtime.InteropServices/Marshal

Marshal.AllocCoTaskMem

  
using System;
using System.Runtime.InteropServices;
class MainClass
{
  static void Main(string[] args)
  {
    UsePointers();
  }
  static unsafe public void UsePointers()
  {
    char * pMyArray = (char*)Marshal.AllocCoTaskMem(6);
    while (*pMyArray != "\0")
    {
      Console.WriteLine(*pMyArray);
      pMyArray++;
    }
    Marshal.FreeCoTaskMem((IntPtr)pMyArray);
  }
}

Marshal.AllocHGlobal

 
using System;
using System.Runtime.InteropServices;
public class MainClass
{
  [STAThread]
  static void Main(string[] args)
  {
    IntPtr ptr = IntPtr.Zero;
    ptr = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(int)));
    Marshal.FreeHGlobal(ptr);
  }
}

Marshal.FreeHGlobal

  
using System;
using System.IO;
using System.Reflection;
using System.Runtime.ConstrainedExecution;
using System.Runtime.InteropServices;
using Microsoft.Win32.SafeHandles;
public class MainClass
{
    public static void Main()
    {
        IntPtr ptr = Marshal.AllocHGlobal(1024);
        if (ptr != IntPtr.Zero){
                Marshal.FreeHGlobal(ptr);
                ptr = IntPtr.Zero;
        }
    }
}

Marshal.StringToCoTaskMemAnsi

 

using System;
using System.Runtime.InteropServices;
using LDAP32;
unsafe class MainClass
{
  private static uint LDAP_PORT = 389;
  [STAThread]
  static void Main(string[] args)
  {
    LDAP32.LDAP* pLdap = null;
    sbyte* pServer = (sbyte*)Marshal.StringToCoTaskMemAnsi("dsaddom.nttest.microsoft.ru");
    sbyte* pName = (sbyte*)Marshal.StringToCoTaskMemAnsi("CN=Greg MacBeth,CN=Users,DC=dsaddom,DC=nttest,DC=MICROSOFT,DC=COM");
    sbyte* pPassword = (sbyte*)Marshal.StringToCoTaskMemAnsi("gregmcb");
    uint Result = 0;
        pLdap = Wldap32.ldap_init(pServer, LDAP_PORT);
    if(pLdap != null)
    {
      Result = Wldap32.ldap_simple_bind_s(pLdap, pName, pPassword);
    }
    Wldap32.ldap_unbind(pLdap);
  }
}