我有一个脚本使用一个txt文件与约80个目标的脚本。我使用ForEach循环来循环遍历目标。我想做的是找出一种方法来修改源文件，删除成功的计算机的名称，留下失败的计算机。这是迄今为止的脚本：

$computers = Get-Content -Path C:\Temp\Computers.txt
$Credentials = Get-Credential
$Credentials.Password | ConvertFrom-SecureString | Set-Content C:\temp\password.txt
$Username = $Credentials.Username
$Password = Get-Content “C:\temp\password.txt” | ConvertTo-SecureString
$Credentials = New-Object System.Management.Automation.PSCredential $Username,$Password
$file1 = "C:\Temp\installer.msi"
$ErrorActionPreference = 'Continue'

ForEach($computer in $computers){

# See if Computer is online before proceeding

IF (Test-Connection -BufferSize 32 -Count 1 -ComputerName $computer) {

$b = New-PSSession -computername $computer -Credential $Credentials

# Create c:\Temp if it doesn't already exist

Invoke-Command -Session $b -ScriptBlock {
New-Item -ItemType Directory -Path C:\Temp -Force
}

#Copy Installer to Local Temp Directory

Copy-Item -path $file1 -Destination "C:\Temp\" -ToSession $b

# Install msi

Invoke-Command -Session $b -ScriptBlock {
$Arguments = "/i", "`"C:\Temp\installer.msi`"", "/qn", "/norestart", "ALLUSERS=1", "/L*v", "`"c:\temp\msisetup.log`""
$msiProcess = Start-Process msiexec.exe -Wait -ArgumentList $Arguments -PassThru

# Check if installation was successful 
# 0 = ERROR_SUCCESS, 3010 = ERROR_SUCCESS_REBOOT_REQUIRED
if( $msiProcess.ExitCode -in 0, 3010 ) {
   Write-Host "Installation succeeded with exit code $($msiProcess.ExitCode)"
}

}

# Wait for Install to finish completely

$Seconds = 60
$EndTime = [datetime]::UtcNow.AddSeconds($Seconds)

while (($TimeRemaining = ($EndTime - [datetime]::UtcNow)) -gt 0) {
  Write-Progress -Activity 'Watiting for Sleep to Finish' -SecondsRemaining $TimeRemaining.TotalSeconds
  Start-Sleep 1
}

# Cleanup

Invoke-Command -Session $b -ScriptBlock {
Remove-Item -Path C:\Temp\installer.msi

}

$List = "C:\Temp\computers.txt"
$string = "$computer"
$ListContent = Get-Content $List
$measureureObject = $string | Measure-Object -Character
$index = $ListContent.IndexOf("$computer")
$length = $measureureObject.Characters
$ListContent.Remove($index,$length) | Set-Content $List

} Else {
Continue
}
}

当到达$ListContent.Remove行时，靠近末尾的部分给出以下错误：
找不到“Remove”和参数计数的重载：“2”.第7行字符：1

• $ListContent.Remove（$index，$length）|设置内容$列表

+ CategoryInfo          : NotSpecified: (:) [], MethodException
  + FullyQualifiedErrorId : MethodCountCouldNotFindBest

先谢谢你了！