Forces an immediate garbage collection of all generations.
Public Shared Sub Collect
public static void Collect()
public: static void Collect()
static member Collect : unit -> unit
Use this method to try to reclaim all memory that is inaccessible.
All objects, regardless of how long they have been in memory, are considered for collection; however, objects that are referenced in managed code are not collected. Use this method to force the system to try to reclaim the maximum amount of available memory.
The following example demonstrates how to use the Collect method to perform a collection on all generations of memory. The code generates a number of unused objects, and then calls the Collect method to clean them from memory.
Imports System Namespace GCCollect_Example Class MyGCCollectClass Private Const maxGarbage As Integer = 1000 Shared Sub Main() 'Put some objects in memory. MyGCCollectClass.MakeSomeGarbage() Console.WriteLine("Memory used before collection: {0}", GC.GetTotalMemory(False)) 'Collect all generations of memory. GC.Collect() Console.WriteLine("Memory used after full collection: {0}", GC.GetTotalMemory(True)) End Sub Shared Sub MakeSomeGarbage() Dim vt As Version Dim i As Integer For i = 0 To maxGarbage - 1 'Create objects and release them to fill up memory 'with unused objects. vt = New Version() Next i End Sub End Class End Namespace
using System; namespace GCCollectExample { class MyGCCollectClass { private const int maxGarbage = 1000; static void Main() { // Put some objects in memory. MyGCCollectClass.MakeSomeGarbage(); Console.WriteLine("Memory used before collection: {0}", GC.GetTotalMemory(false)); // Collect all generations of memory. GC.Collect(); Console.WriteLine("Memory used after full collection: {0}", GC.GetTotalMemory(true)); } static void MakeSomeGarbage() { Version vt; for(int i = 0; i < maxGarbage; i++) { // Create objects and release them to fill up memory // with unused objects. vt = new Version(); } } } }
using namespace System; const int maxGarbage = 1000; void MakeSomeGarbage() { Version^ vt; for ( int i = 0; i < maxGarbage; i++ ) { // Create objects and release them to fill up memory // with unused objects. vt = gcnew Version; } } int main() { // Put some objects in memory. MakeSomeGarbage(); Console::WriteLine( "Memory used before collection: {0}", GC::GetTotalMemory( false ) ); // Collect all generations of memory. GC::Collect(); Console::WriteLine( "Memory used after full collection: {0}", GC::GetTotalMemory( true ) ); }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2