Hold a file open exclusively, not even accessible for reading (PowerShell)

OpenExclusively.ps1

# Open the file in exclusive mode
while ($true) {
    try {
        $filenameAndPath = Read-Host "Enter filename and path for the file to hold open exclusively"
        if ([string]::IsNullOrEmpty($filenameAndPath)) {
            Write-Host "No filename was entered. Please provide a valid filename."
            continue
        }

        if (-not [System.IO.Path]::IsPathRooted($filenameAndPath)) {
            $filenameAndPath = [System.IO.Path]::GetFullPath($filenameAndPath)
        }

        if (Test-Path $filenameAndPath -PathType Container) {
            Write-Host "$filenameAndPath is a directory. Please provide a valid filename."          
            continue
        }

        if (-not (Test-Path $filenameAndPath -PathType leaf)) {
            Write-Host "File not found. Please provide a valid filename."
            continue
        }

        break
    }
    catch [System.IO.FileNotFoundException] {
        Write-Host "File not found. Please provide a valid filename."
    }
    catch [System.Management.Automation.PipelineStoppedException] {
        Write-Host ""
        Write-Host "Keyboard interrupt. Exiting..."
        exit
    }
}
try {
    $fileStream = New-Object System.IO.FileStream($filenameAndPath, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read, [System.IO.FileShare]::None)
    try {
        Write-Host ""
        Write-Host "Holding open, exclusively: $filenameAndPath"
        Read-Host "Press enter to continue..."
    }
    finally {
        $fileStream.Close()
    }
}
catch [System.IO.IOException] {
    Write-Host "Error opening file: File is already in use."
    exit 1
}

The "easy" methods to lock a file exclusively (like doing the command C:> Pause > test.txt ), still permit reading. This script is mean to lock the file exclusively and prevent even reading.

For the equivalent of this script, but in Python see:

https://gist.github.com/sgornick/6acb6974370da98f3b3c578d780c0728