How to read lines of a text file with specific word to an array and get the first four characters of the last line in that array?

Following code helped me to read the first four characters and the characters after third tab of last line and write the details to a XML file.

 #Required parameters to set
 param(
        [Parameter(Position=0,Mandatory=$true)] [string]$ControlFilePath,
        [Parameter(Position=1,Mandatory=$true)] [string]$MatchPattern,
        [Parameter(Position=2,Mandatory=$true)] [string]$OutControlFile
     ) 

    If (Test-path $OutControlFile) {
            Remove-Item $OutControlFile
  }

$LastLine= get-content $ControlFilePath -ReadCount 1000 |  foreach { $_ -match "$MatchPattern" } | Select-Object -Last 1
$BuildNumberDigit=$LastLine.Substring(0,4)
$BuildNumberFormat=($LastLine -split "`t")[2].substring(0)

# Create The Document
$XmlWriter = New-Object System.XMl.XmlTextWriter($OutControlFile,$Null)

# Set The Formatting
$xmlWriter.Formatting = 'Indented'
$xmlWriter.Indentation = 1
$XmlWriter.IndentChar = "`t"

# Write the XML Decleration
$xmlWriter.WriteStartDocument()

# Write the Document
$xmlWriter.WriteStartElement("BuildVersions")
$xmlWriter.WriteStartElement("property")
$xmlWriter.WriteAttributeString("name","BuildNumber")
$xmlWriter.WriteAttributeString("value","$BuildNumberDigit ")
$xmlWriter.WriteEndElement() # Closing Property
$xmlWriter.WriteStartElement("property")
$xmlWriter.WriteAttributeString("name","BuildNumberFormat")
$xmlWriter.WriteAttributeString("value","$BuildNumberFormat")
$xmlWriter.WriteEndElement() # Closing Property
$xmlWriter.WriteEndElement() # Closing BuildVersions

# End the XML Document
$xmlWriter.WriteEndDocument() #Closing Documents

# Finish The Document
$xmlWriter.Finalize
$xmlWriter.Close()

ControlFilepath ==> Path to the txt file where the code in question exists\FileName

MatchPattern ==> Pattern to search for in the txt file

OutControlFile ==> Path to the XML file\Filename

So the output XML file looks like

<BuildVersions>
    <property name="BuildNumberDigit" value="1236 " />
    <property name="BuildNumberFormat" value="Build1Rel" />
</BuildVersions>