PowerShell中无法创建Ethernet/IP类实例的问题求助

问题背景 #

在PowerShell中尝试创建Ethernet/IP类实例时，即使已在脚本顶部加载程序集，仍遇到程序集未加载或无法实例化的问题，该功能在Visual Studio中可正常运行。

PowerShell测试脚本 #

# Load the EEIP.dll
Add-Type -Path C:\myDlls\EIP\EEIP.dll
Add-Type Sres.Net.EEIP
# Define PLC connection parameters
$IPAddress = "192.168.1.190"
$Timeout = 2000  # Timeout value in milliseconds
try {
    # Create an instance of the Ethernet/IP communication class
    $plc = New-Object EthernetIP.EEIPClient
}
catch {
     Write-Host "Error communicating with PLC:" $_.Exception.Message
}

Visual Studio正常运行代码 #

using Sres.Net.EEIP;
class Program
{
    static void Main(string[] args)
    {
        EEIPClient eeipClient = new EEIPClient();
        eeipClient.RegisterSession("192.168.1.190");
        eeipClient.UnRegisterSession();
    }
}

DLL加载错误排查及信息 #

为排查DLL加载问题，使用以下脚本：

try
{
   Add-Type -Path "C:\myDlls\EIP\EEIP.dll"
   #Add-Type -Path "C:\OPC\OpcComRcw.dll"
}
catch [System.Reflection.ReflectionTypeLoadException]
{
   Write-Host "Message: $($_.Exception.Message)"
   Write-Host "StackTrace: $($_.Exception.StackTrace)"
   Write-Host "LoaderExceptions: $($_.Exception.LoaderExceptions)"
}

得到错误信息：

Add-Type : Could not load file or assembly 'file:///C:\myDlls\EIP\EEIP.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)

已执行的解决步骤及剩余问题 #

通过右键DLL文件，在属性中勾选解除阻止并重启PowerShell后，成功解决了上述加载错误，但仍然无法创建Ethernet/IP类实例。

内容的提问来源于stack exchange，提问作者user112307