Lists all available .NET Framework versions

DetermineNetframeworkVersion.ps1

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Function Get-NETFrameworkVersion
{
    $RegistryPrefix = "Registry::";

# 4.x
    Try {
            $NET4Key = Get-Item -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319\SKUs")

            $MaxVersionNumber = 0
            $MaxVersionName = ""
            $NET4Key.GetSubKeyNames() | WHERE { $_ -Match "NETFramework" } | ForEach-Object {
                Try {
                    $Version = [regex]::Match($_, "v\d\.?\d?\.?\d?").Value.Replace("v", "")
                    $VersionNumber = [int]::Parse($Version.Replace(".", ""))

                    # in case 4.6 is less than 4.5.1
                    If ($VersionNumber -lt 100) {
                        $VersionNumber *= 10
                    }

                    If ($MaxVersionNumber -lt $VersionNumber) {
                        $MaxVersionNumber = $VersionNumber
                        $MaxVersionName = $Version
                    }
                }
                Catch {}
            }

            If ($MaxVersionNumber -ne 0) {
                Write-Host ".NET Framework $MaxVersionName";
            }
    } Catch {}

#3.5 Original
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5") | SELECT -ExpandProperty "SP") -eq 0)) {
            Write-Host ".NET Framework 3.5";
        }
    } Catch {}

#3.5 Service Pack 1
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5") | SELECT -ExpandProperty "SP") -eq 1)) {
            Write-Host ".NET Framework 3.5 service pack 1 ";
        }
    } Catch {}

#3.0 Original
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0\Setup") | SELECT -ExpandProperty "InstallSuccess") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0") | SELECT -ExpandProperty "SP") -eq 0)) {
            Write-Host ".NET Framework 3.0";
        }

    } Catch {}

#3.0 Service Pack 1
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0") | SELECT -ExpandProperty "SP") -eq 1)) {
            Write-Host ".NET Framework 3.0 service pack 1 ";
        }
    } Catch {}

#3.0 Service Pack 2
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0") | SELECT -ExpandProperty "SP") -eq 2)) {
            Write-Host ".NET Framework 3.0 service pack 2 ";
        }
    } Catch {}

#2.0 Original
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727") | SELECT -ExpandProperty "SP") -eq 0)) {
            Write-Host ".NET Framework 2.0";
        }
    } Catch {}

#2.0 Service Pack 1
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727") | SELECT -ExpandProperty "SP") -eq 1)) {
            Write-Host ".NET Framework 2.0 service pack 1 ";
        }
    } Catch {}

#2.0 Service Pack 2
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727") | SELECT -ExpandProperty "SP") -eq 2)) {
            Write-Host ".NET Framework 2.0 service pack 2 ";
        }
    } Catch {}

#1.1 Original on 32-bit system
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322") | SELECT -ExpandProperty "SP") -eq 0)) {
            Write-Host ".NET Framework 1.1";
        }
    } Catch {}

#1.1 Original on 64-bit system
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKLM\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v1.1.4322") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKLM\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v1.1.4322") | SELECT -ExpandProperty "SP") -eq 0)) {
            Write-Host ".NET Framework 1.1";
        }
    } Catch {}

#1.1 Service Pack 1 on 32-bit system
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322") | SELECT -ExpandProperty "SP") -eq 1)) {
            Write-Host ".NET Framework 1.1 service pack 1 ";
        }
    } Catch {}

#1.1 Service Pack 1 on 64-bit system
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKLM\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v1.1.4322") | SELECT -ExpandProperty "Install") -eq 1) -and
            ((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKLM\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v1.1.4322") | SELECT -ExpandProperty "SP") -eq 1)) {
            Write-Host ".NET Framework 1.1 service pack 1 ";
        }
    } Catch {}

#1.0 Original (on supported platforms except for Windows XP Media Center and Tablet PC)
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}") | SELECT -ExpandProperty "Version") -eq "1.0.3705.0")) {
            Write-Host ".NET Framework 1.0";
        }
    } Catch {}

#1.0 Service Pack 1 (on supported platforms except for Windows XP Media Center and Tablet PC)
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}") | SELECT -ExpandProperty "Version") -eq "1.0.3705.1")) {
            Write-Host ".NET Framework 1.0 service pack 1";
        }
    } Catch {}

#1.0 Service Pack 2 (on supported platforms except for Windows XP Media Center and Tablet PC)
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}") | SELECT -ExpandProperty "Version") -eq "1.0.3705.2")) {
            Write-Host ".NET Framework 1.0 service pack 2";
        }
    } Catch {}

#1.0 Service Pack 3 (on supported platforms except for Windows XP Media Center and Tablet PC)
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}") | SELECT -ExpandProperty "Version") -eq "1.0.3705.3")) {
            Write-Host ".NET Framework 1.0 service pack 3";
        }
    } Catch {}

#1.0 Service Pack 2 (shipped with Windows XP Media Center 2002/2004 and Tablet PC 2004)
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{FDC11A6F-17D1-48f9-9EA3-9051954BAA24}") | SELECT -ExpandProperty "Version") -eq "1.0.3705.2")) {
            Write-Host ".NET Framework 1.0 service pack 2";
        }
    } Catch {}

#1.0 Service Pack 3 (shipped with Windows XP Media Center 2002/2004 and Tablet PC 2004)
    Try {
        IF (((Get-ItemProperty -ErrorAction Stop -Path ($RegistryPrefix + "HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{FDC11A6F-17D1-48f9-9EA3-9051954BAA24}") | SELECT -ExpandProperty "Version") -eq "1.0.3705.3")) {
            Write-Host ".NET Framework 1.0 service pack 3";
        }
    } Catch {}
}

Get-NETFrameworkVersion