GC.Collect()

using System;

class MyGCCollectClass
{
private const int maxGarbage = 1000;

static void Main()
{
// Put some objects in memory.
MyGCCollectClass.MakeSomeGarbage();
Console.WriteLine(“Memory used before collection: {0:N0}”,
GC.GetTotalMemory(false));

  // Collect all generations of memory.
  GC.Collect();
  Console.WriteLine("Memory used after full collection:   {0:N0}",
                    GC.GetTotalMemory(true));

}

static void MakeSomeGarbage()
{
Version vt;

  // Create objects and release them to fill up memory with unused objects.
  for(int i = 0; i < maxGarbage; i++) {
     vt = new Version();
  }

}
}
// The output from the example resembles the following:
// Memory used before collection: 79,392
// Memory used after full collection: 52,640