C#

using System.Runtime.InteropServices;

namespace PutYourNamespaceHere {
    /// <summary>
    /// Utility class for manipulating working set.
    /// </summary>
    internal class WorkingSet {
        /// <summary>
        /// Removes as many pages as possible from the working set of the
        /// current process.
        /// </summary>
        internal static void Empty() {
            SetProcessWorkingSetSize( -1, -1, -1 );
        }

        [ DllImport( "Kernel32", 
              CharSet=System.Runtime.InteropServices.CharSet.Auto, 
              SetLastError=true)]
        private static extern bool SetProcessWorkingSetSize(
            int handle, int min, int max);
    }
}

MyObject = new MyClass();

MyObject.SomeProperty = "XYZ";

//Start some thread passing my object instance

while(<here I need something to suspend this thread until
      the "SomeProperty"  of the class instance changes">);
{
     // Do some processing here
}

MyClass MyObject = new MyClass();<br />
<br />
MyObject.SomeProperty = "XYZ";<br />
<br />
//Start some thread (passing my object instance?)<br />
Thread thrSomeThread = new Thread(new ThreadStart(ThreadRunner));<br />
thrSomeThread.Start();<br />
<br />
lock(MyObject)<br />
{<br />
  Monitor.Wait(MyObject); //wait until pulsed<br />
}<br />
<br />
// Do some processing here

public void ThreadRunner()<br />
{<br />
  //whatever this thread does<br />
}

//The property in some class that has access to MyObject<br />
public int SomeProperty<br />
{<br />
  set<br />
  {<br />
    m_iProperty = SomeProperty;<br />
    <br />
    lock(MyObject)<br />
    {<br />
      Monitor.Pulse(MyObject);  //signal waiting thread<br />
    }<br />
  }<br />
}

<br />
ShellClass obj = new ShellClass();<br />
obj.FileRun();<br />