Question

How to allocate 1MB in VB.NET

Answer 1

Imports System

Public Class Program
    Public Shared Sub Main(ByVal args As String())
        Dim buffer As Byte() = New Byte(1024 * 1024) {} ' 1MB = 1,048,576 bytes
		
        Console.WriteLine("Allocated 1MB of memory.")
    End Sub
End Class


' run:
'
' Allocated 1MB of memory.
'

 

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Answer 2

Imports System
Imports System.IO

Class Program
	Public Shared Sub Main()
        Using ms As MemoryStream = New MemoryStream(New Byte(1048575) {}) ' 1MB = 1,048,576 bytes
        End Using

        Console.WriteLine("Allocated 1MB using MemoryStream.")
    End Sub
End Class



' run:
'
' Allocated 1MB using MemoryStream.
'

 

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Answer 3

Imports System
Imports System.Runtime.InteropServices

Class Program
	Public Shared Sub Main()
		' Allocate 1MB = 1,048,576 bytes in unmanaged memory
        Dim ptr As IntPtr = Marshal.AllocHGlobal(1024 * 1024)
		
        Console.WriteLine("Allocated 1MB of unmanaged memory.")
        Marshal.FreeHGlobal(ptr)
    End Sub
End Class



' run:
'
' Allocated 1MB of unmanaged memory.
'

 

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