add: method to avoid assembly already loaded error

source/Private/Assert-ModuleAvailability.ps1

@@ -20,6 +20,17 @@ function Assert-ModuleAvailability {
                 else {
                     Write-Verbose "$ModuleName module is already at required version or newer."
                 }
+                if ($ModuleName -eq "Microsoft.Graph") {
+                    # "Preloading Microsoft.Graph assembly to prevent type-loading issues..."
+                    Write-Verbose "Preloading Microsoft.Graph assembly to prevent type-loading issues..."
+                    try {
+                        # Run a harmless cmdlet to preload the assembly
+                        Get-MgGroup -Top 1 -ErrorAction SilentlyContinue | Out-Null
+                    }
+                    catch {
+                        Write-Verbose "Could not preload Microsoft.Graph assembly. Error: $_"
+                    }
+                }
                 if ($SubModules.Count -gt 0) {
                     foreach ($subModule in $SubModules) {
                         Write-Verbose "Importing submodule $ModuleName.$subModule..."
@@ -30,11 +41,9 @@ function Assert-ModuleAvailability {
                     Write-Verbose "Importing module $ModuleName..."
                     Import-Module -Name $ModuleName -RequiredVersion $RequiredVersion -ErrorAction Stop -WarningAction SilentlyContinue | Out-Null
                 }
-
         }
         catch {
             throw "Assert-ModuleAvailability:`n$_"
         }
     }
-
-}
+}