Load NuGet.Versioning to a new ALC

Author: adityapatwardhan

src/dsc/psresourceget.ps1

@@ -13,6 +13,40 @@ param(
     $stdinput
 )
 
+$alcCode = @"
+using System;
+using System.IO;
+using System.Runtime.Loader;
+using System.Reflection;
+
+public class IsolatedLoadContext : AssemblyLoadContext
+{
+    private string _basePath;
+
+    public IsolatedLoadContext(string basePath) : base(isCollectible:true)
+    {
+        _basePath = basePath;
+    }
+
+    protected override Assembly Load(AssemblyName assemblyName)
+    {
+        string depPath = Path.Combine(_basePath, assemblyName.Name + ".dll");
+
+        if (File.Exists(depPath))
+        {
+            return LoadFromAssemblyPath(depPath);
+        }
+
+        return null;
+    }
+}
+"@
+
+Add-Type -TypeDefinition $alcCode
+
+$assemblyFolder = "$PSScriptRoot/dependencies"
+$alc = [IsolatedLoadContext]::new($assemblyFolder)
+
 enum Scope {
     CurrentUser
     AllUsers
@@ -228,29 +262,17 @@ function SatisfiesVersion {
         [string]$versionRange
     )
 
+    $asmPath = Join-Path $PSScriptRoot 'dependencies/NuGet.Versioning.dll'
+    $pluginAssembly = $alc.LoadFromAssemblyPath($asmPath)
 
-    $loaded = [System.Runtime.Loader.AssemblyLoadContext]::All |
-        ForEach-Object { $_.Assemblies } |
-        Where-Object { $_.GetName().Name -eq 'NuGet.Versioning' }
-
-    Write-Verbose -Verbose "checking if NuGet.Versioning is already loaded: $loaded"
-
-    if (-not $loaded) {
-        $nugetVersioningPath = Join-Path -Path $PSScriptRoot -ChildPath 'dependencies/NuGet.Versioning.dll'
-
-        if (-not (Test-Path -Path $nugetVersioningPath)) {
-            Write-Trace -message "NuGet.Versioning.dll not found at expected path: $nugetVersioningPath" -level error
-            return $false
-        }
+    try {
 
-        Write-Verbose -Verbose "Loading NuGet.Versioning assembly from $PSScriptRoot/dependencies/NuGet.Versioning.dll"
-        Add-Type -Path "$PSScriptRoot/dependencies/NuGet.Versioning.dll"
+        $versionRangeType = $pluginAssembly.GetType("NuGet.Versioning.VersionRange")
+        $versionRangeObj = $versionRangeType.GetMethod("Parse", [Type[]]@([string])).Invoke($null, @($versionRange))
 
-    }
+        $versionType = $pluginAssembly.GetType("NuGet.Versioning.NuGetVersion")
+        $resourceVersion = $versionType.GetMethod("Parse", [Type[]]@([string])).Invoke($null, @($version))
 
-    try {
-        $versionRangeObj = [NuGet.Versioning.VersionRange]::Parse($versionRange)
-        $resourceVersion = [NuGet.Versioning.NuGetVersion]::Parse($version)
         return $versionRangeObj.Satisfies($resourceVersion)
     }
     catch {