function Remove-AppSetting {
<#
.SYNOPSIS
    Removes an appSetting Key/Value pair in the specified file. Filepath defaults to the 64 bit machine config.

.DESCRIPTION
    Remove an appSetting key/value pair in the specified config file if present.
	Will default to the global 64 bit machine.config file if no config file value specified.
    Will not tickle files where no values have changed.
    Can connect to remote computers as well.

.PARAMETER Key
    [string] The appSetting key

.PARAMETER FilePath
    [string] The location to change settings in. Defaults to the global 64bit machine.config file.

.PARAMETER ComputerName
    [string] The computer to connect to. Defaults to localhost

.PARAMETER Force
    [switch] Allow forcing the write of the process. This is due to the option for ShouldProcess.
#>
    [CmdletBinding(SupportsShouldProcess, ConfirmImpact='None')]
    [System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("PSShouldProcess", "", Justification = "Internal function uses the SupportsShouldProcess flag, not us, this is good and proper")]
    param (
        [Parameter(Mandatory = $true)]
        [string]$Key,

        [Parameter(Mandatory = $false)]
        [Alias("Path")]
        [string]$FilePath = (Get-DotNetConfigPath -use64Bit $true),

        [Parameter(Mandatory = $false)]
        [string]$ComputerName = "localhost",

        [Parameter(Mandatory = $false)]
        [switch]$Force
    )

    $logLead = (Get-LogLeadName)

#region guard clauses
    # If a computername was provided, modify the filepath to be a UNC path.
    if((![string]::IsNullOrWhiteSpace($ComputerName)) -and ($ComputerName -ne "localhost")) {
        $FilePath = (Get-UncPath -filePath $FilePath -ComputerName $ComputerName)
    }

    if (!(Test-Path -PathType Leaf -Path $FilePath)) {
        Write-Warning "$logLead : Could not find a file at [$FilePath].  Execution cannot continue."
        return ## exit early
    }

    Write-Verbose "$logLead : Reading Config file at [$FilePath]"
    $xml = Read-XMLFile $FilePath
    if(!$xml) {
        throw "$logLead : Config at [$FilePath] could not be converted to xml."
    }

    Write-Verbose "$logLead : Ensuring configuration root node exists..."
    if(!$xml.configuration){
        throw "$logLead : How does [$FilePath] not have a root <configuration> element??"
    }
#endregion guard clauses

    Invoke-CommandWithRetry -MaxRetries 3 -SecondsDelay 1 -Arguments @($Key, $FilePath, $Force) -ScriptBlock {
        param($Key, $FilePath, $Force)
        Remove-AppSettingPrivate -Key $Key -FilePath $FilePath -Force:$Force
    }
}