'；无法将“；系统__ComObject”；值'；PowerShell中出现错误

我正在尝试将以下C#代码转换为PowerShell（我忽略了代码中我认为不相关的部分）：

C#

System.Type t = System.Type.GetTypeFromProgID("VisualStudio.DTE.10.0", true);
object obj = System.Activator.CreateInstance(t, true);
EnvDTE80.DTE2 dte = (EnvDTE80.DTE2)obj;
dte.MainWindow.Activate();
dynamic solution = dte.Solution;
solution.Create(solution_folder_path, solution_name);
solution.SaveAs(solution_file_path);
dynamic project = solution.AddFromTemplate(template_path, project_folder_path, project_name);
TCatSysManagerLib.ITcSysManager system_manager = project.Object;

PowerShell

[System.Reflection.Assembly]::LoadFrom("C:'Windows'assembly'GAC_MSIL'TCatSysManagerLib'2.1.0.0__180016cd49e5e8c3'TCatSysManagerLib.dll");
$dte = New-Object -ComObject VisualStudio.DTE.10.0
$dte.SuppressUI = $false
$dte.MainWindow | %{$_.GetType().InvokeMember("Visible", "SetProperty", $null, $_, $true)}
$solution = $dte.Solution
$project = $solution.AddFromTemplate($template_path, $project_folder_path, $project_name)
[TCatSysManagerLib.ITcSysManager] $system_manager = [TCatSysManagerLib.ITcSysManager] $project.Object

我遇到的问题是PowerShell中的最后一行返回了以下形式的错误：

无法转换类型为的"System.__ComObject"值键入"System.__ComObject#｛3b56a5ce-0c02-440b-8ced-f1f3e83f66ed｝"TCatSysManagerLib.ITcSysManager".

添加了详细信息：

我可以在PowerShell代码中省略[TCatSysManagerLib.ITcSysManager]类型。然而，我在稍后转换这个C#代码时遇到了同样的问题：

TCatSysManagerLib.ITcSmTreeItem gvl = system_manager.LookupTreeItem("TIPC^PLC1^PLC1 Project^GVLs^GVL");
TCatSysManagerLib.ITcPlcDeclaration gvl_declaration = (TCatSysManagerLib.ITcPlcDeclaration)gvl;
string gvl_declaration_text = System.IO.File.ReadAllText(gvl_declaration_text_file_path);
gvl_declaration.DeclarationText = gvl_declaration_text;

在这种情况下，我必须转换为TCatSysManagerLib.ITcPlcDeclaration类型，以便访问gvl_declaration的DeclarationText属性。

C#代码修改自：http://infosys.beckhoff.com/english.php？内容=/content/1033/tc3_automationinterface/100886391299624331.html&id=

我是C#和PowerShell的新手，并从示例中对它们进行了修改。如有任何建议，我们将不胜感激。