How to check ASP NET Version loaded on a system

Question

How can I check the version of ASP NET that is installed on my system

User · Answer

Here is some code that will return the installed .NET details:

<%@ Page Language="VB" Debug="true" %>
<%@ Import namespace="System" %>
<%@ Import namespace="System.IO" %>
<% 
Dim cmnNETver, cmnNETdiv, aspNETver, aspNETdiv As Object
Dim winOSver, cmnNETfix, aspNETfil(2), aspNETtxt(2), aspNETpth(2), aspNETfix(2) As String

winOSver = Environment.OSVersion.ToString
cmnNETver = Environment.Version.ToString
cmnNETdiv = cmnNETver.Split(".")
cmnNETfix = "v" & cmnNETdiv(0) & "." & cmnNETdiv(1) & "." & cmnNETdiv(2)

For filndx As Integer = 0 To 2
  aspNETfil(0) = "ngen.exe"
  aspNETfil(1) = "clr.dll"
  aspNETfil(2) = "KernelBase.dll"

  If filndx = 2   
    aspNETpth(filndx) = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.System), aspNETfil(filndx))
  Else
    aspNETpth(filndx) = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Windows), "Microsoft.NET\Framework64", cmnNETfix, aspNETfil(filndx))
  End If

  If File.Exists(aspNETpth(filndx)) Then
    aspNETver = Diagnostics.FileVersionInfo.GetVersionInfo(aspNETpth(filndx))
    aspNETtxt(filndx) = aspNETver.FileVersion.ToString
    aspNETdiv = aspNETtxt(filndx).Split(" ")
    aspNETfix(filndx) = aspNETdiv(0)
  Else
    aspNETfix(filndx) = "Path not found... No version found..."
  End If
Next

Response.Write("Common MS.NET Version (raw): " & cmnNETver & "<br>")
Response.Write("Common MS.NET path: " & cmnNETfix & "<br>")
Response.Write("Microsoft.NET full path: " & aspNETpth(0) & "<br>")
Response.Write("Microsoft.NET Version (raw): " & aspNETtxt(0) & "<br>")
Response.Write("<b>Microsoft.NET Version: " & aspNETfix(0) & "</b><br>")
Response.Write("ASP.NET full path: " & aspNETpth(1) & "<br>")
Response.Write("ASP.NET Version (raw): " & aspNETtxt(1) & "<br>")
Response.Write("<b>ASP.NET Version: " & aspNETfix(1) & "</b><br>")
Response.Write("OS Version (system): " & winOSver & "<br>")
Response.Write("OS Version full path: " & aspNETpth(2) & "<br>")
Response.Write("OS Version (raw): " & aspNETtxt(2) & "<br>")
Response.Write("<b>OS Version: " & aspNETfix(2) & "</b><br>")
%>

Here is the new output, cleaner code, more output:

Common MS.NET Version (raw): 4.0.30319.42000
Common MS.NET path: v4.0.30319
Microsoft.NET full path: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\ngen.exe
Microsoft.NET Version (raw): 4.6.1586.0 built by: NETFXREL2
Microsoft.NET Version: 4.6.1586.0
ASP.NET full path: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\clr.dll
ASP.NET Version (raw): 4.7.2110.0 built by: NET47REL1LAST
ASP.NET Version: 4.7.2110.0
OS Version (system): Microsoft Windows NT 10.0.14393.0
OS Version full path: C:\Windows\system32\KernelBase.dll
OS Version (raw): 10.0.14393.1715 (rs1_release_inmarket.170906-1810)
OS Version: 10.0.14393.1715

User · Answer

Look in c  windows Microsoft NET Framework and you will see various folders starting with  v  indicating the versions of  NET installed

User · Answer

open a new command prompt and run the following command  dotnet --info

User · Answer

You can use   lt   Response Write  Version      System Environment Version ToString       gt    That will get the currently running version  You can check the registry for all installed versions at      HKEY LOCAL MACHINE SOFTWARE Microsoft NET   Framework Setup NDP

User · Answer

You can see which version gets executed when you load the page with Google Chrome   developer tools  preinstalled  or Firefox   Firebug  add-on     I use Google Chrome    Open Chrome and use Ctrl Shift I to open the developer tools  Go to the  Network  Tab Click on the small button at the bottom  Preserve log upon Navigation  Load any of your pages Click on the response header   It looks like this

User · Answer

I had same problem to find a way to check whether ASP NET 4 5 is on the Server  Because v4 5 is in place replace to v4 0  if you look at c  windows Microsoft NET Framework  you will not see v4 5 folder  Actually there is a simple way to see the version installed in the machine  Under Windows Server 2008 or Windows 7  just go to control panel -  Programs and Features  you will find  Microsoft  NET Framework 4 5  if it is installed

User · Answer

I needed this information too and got information with this method  Launch PowerShell run the  import-module servermanager  command   without quotes   after that for asp net 3 5 check run the  get-windowsfeature web-asp-net  command   without quotes   for asp net 4 5 check run the  get-windowsfeature Net-Framework-45-Core  command   without quotes   Both of the commands will inform you below Install State header  Detecting version via GUI in server environment and details can be found in this link

User · Answer

Alternatively  you can create a button on your webpage and in the Page Load type   Trace IsEnabled   True   And in the button click event type   Response Write Trace    This will bring up all the trace information and you will find your ASP NET version in the  Response Headers Collection  under  X-ASPNet-Version

[asp.net] How to check ASP.NET Version loaded on a system?

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