C# - GC.Collect() Method with Example

In this tutorial, we will learn about the GC.Collect() method with its definition, usage, syntax, and example. By Nidhi Last updated : April 03, 2023

GC.Collect() Method

The GC.Collect() method is used to execute garbage collection forcefully.


void  GC.Collect(int genNum);


  • genNum: The number of the oldest generation to be garbage collected.

Return Value

It does not return any value.

C# program to force an immediate garbage collection

The source code to force an immediate garbage collection is given below. The given program is compiled and executed successfully.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1 {
  class Program {
    static void Main(string[] args) {
      Program pObj = new Program();

      Console.WriteLine("Garbage collection done forcefully");


Garbage collection done forcefully

Press any key to continue . . .

C# Garbage Collection Programs »

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