When using Get-AppxPackage and Get-ItemProperty in powershell in C#, the datatable cannot be added

I am developing a WinForms application in C#. I am trying to retrieve software information (name, version) installed on the PC using PowerShell with Get-AppxPackage and Get-ItemProperty. The information retrieved from Get-ItemProperty is stored correctly in a DataTable after collecting it as a collection, and it is displayed in a DataGridView. However, the Name and Version retrieved from Get-AppxPackage are not being collected in the collection, resulting in a count of 0. Naturally, they are not being displayed in the DataTable or the DataGridView.

The code for loading PowerShell is the same in both cases, and I only changed the command values. So why isn't it working?

Here is the attached code.

private DataTable GetPrograms_1()
{
DataTable programTable_1 = new DataTable();
programTable_1.Columns.Add("Item Name");
programTable_1.Columns.Add("Item Version");

        // Get-ItemProperty - UWP 
        string? command = "Get-ItemProperty HKLM:\\Software\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\* | Select-Object DisplayName, DisplayVersion";
        PowerShell powerShell = PowerShell.Create();
        powerShell.AddScript(command);

        // PowerShell
        Collection<PSObject> psObjects = powerShell.Invoke();

        //  DataTable
        foreach (PSObject psObject in psObjects)
        {
            if (psObject.Properties["DisplayName"] != null && psObject.Properties["DisplayVersion"] != null)
            {
                string itemName = psObject.Properties["DisplayName"]?.Value?.ToString();
                string itemVersion = psObject.Properties["DisplayVersion"]?.Value?.ToString();

                programTable_1.Rows.Add(itemName, itemVersion);
            }
        }
        return programTable_1;
    }

    // UWP data
    private DataTable GetPrograms_2()
    {
        DataTable programTable_2 = new DataTable();
        programTable_2.Columns.Add("App Name");
        programTable_2.Columns.Add("App Version");

        // Get-AppxPackage - UWP
        string? command = "Get-AppxPackage -AllUsers | Select-Object Name, Version";
        PowerShell powerShell = PowerShell.Create();
        powerShell.AddScript(command);

        // PowerShell 
        Collection<PSObject> psObjects = powerShell.Invoke();

        // DataTable
        foreach (PSObject psObject in psObjects)
        {
            if (psObject.Properties["Name"]?.Value != null && psObject.Properties["Version"]?.Value != null)
            {
                string appName = psObject.Properties["Name"]?.Value?.ToString();
                string appVersion = psObject.Properties["Version"]?.Value?.ToString();

                programTable_2.Rows.Add(appName, appVersion);
            }
        }
        return programTable_2;
    }

Using Get-AppxPackage is necessary. The data from the registry under CurrentVersion/Uninstall cannot replace the data obtained from Get-AppxPackage. The purpose is to extract information about UWP applications on the PC. To retrieve the list of apps from "Settings" -> "Apps" -> "Apps & features" in Windows 11, Get-AppxPackage must be used.

I took the method of executing the PowerShell script directly via powershell.exe and then reading the results from standard output.

// PowerShell Process Start
Process process = new Process();
process.StartInfo.FileName ="powershell.exe";
process.StartInfo.Arguments = $"-Command (Get-AppxPackage | Select-Object Name, Version)";
process.StartInfo.RedirectStandardOutput = true;
process.StartInfo.UseShellExecute = false;
process.StartInfo.CreateNoWindow = true;
process.Start();

// Read Result
string output = process.StandardOutput.ReadToEnd();

// Process End
process.WaitForExit();