How to avoid a key name value not getting updated while doing find and replace in powershell?

See more:

C#

ASP.NET

PowerShell

I want to avoid a key name value not getting updated while doing find and replace in powershell. I am able to find and replace filestore path in config file. But I do not want to replace the folder path for a key in the config file
Here I am replacing folder path with C: drive to a network path. But I don't want to replace the folder path for a key

ChartImageHandler in config file.
<pre><add key="ReconciliationFilePath" value="\C:PAYMENT_HUB\Filestore\FTS_FileStore\ISGREPORTS\" />
   
    <add key="ChartImageHandler" value="storage=file;timeout=20;dir=\C:PAYMENT_HUB\Filestore\FTS_FileStore\TempImageFiles\;" />

What I have tried:

Config path as below:

<pre><add key="ReconciliationFilePath" value="\C:PAYMENT_HUB\Filestore\FTS_FileStore\ISGREPORTS\" />
   
 
    <add key="ChartImageHandler" value="storage=file;timeout=20;dir=\C:PAYMENT_HUB\Filestore\FTS_FileStore\TempImageFiles\;" />

Script is as below:

#UAEWPS Application if ($Line -notmatch '\#')
$Application_Path="C:\PAYMENT_HUB\UAEFTS\Web.Config"
$Application_Path

foreach ($Line in $ConfigFile) {
    if ($Line -notmatch 'ChartImageHandler') {
    (Get-Content $Application_Path) | 
     Foreach-Object {$_.replace("C:\", "\\10.40.0.137\")} | 
     Set-Content $Application_Path	
}
}