How would you retrieve a list of all files in a directory using PowerShell? Provide the necessary commands.

To retrieve a list of all files in a directory using PowerShell, you can utilize the `Get-ChildItem` cmdlet. This cmdlet allows you to access and retrieve information about files and directories within a specified path. Here's the necessary command:

```
powershell`Get-ChildItem -Path "C:\Path\to\Directory" -File`
```
In this command, you replace `"C:\Path\to\Directory"` with the actual path to the directory from which you want to retrieve the list of files. The `-File` parameter ensures that only files are returned, excluding directories and other non-file items.

When you execute this command, PowerShell will return a collection of `FileInfo` objects representing each file in the specified directory. Each `FileInfo` object contains various properties related to the file, such as Name, LastWriteTime, Length, and others.

If you want to retrieve files from the current directory, you can omit the `-Path` parameter:

```
powershell`Get-ChildItem -File`
```
Executing this command without specifying the path will retrieve a list of all files in the current working directory.

To display specific properties of the files, you can pipe the output of `Get-ChildItem` to the `Select-Object` cmdlet. For example, to display only the file names, you can use the following command:

```
powershell`Get-ChildItem -File | Select-Object -Property Name`
```
This command retrieves the files and selects the "Name" property to display. You can modify the `Select-Object` cmdlet to choose other properties or even create calculated properties based on your requirements.

By using the `Get-ChildItem` cmdlet with the appropriate parameters, you can easily retrieve a list of all files in a directory using PowerShell. The flexibility and extensibility of PowerShell allow you to further manipulate and process the retrieved file information as needed.