try {

    const vscode = require("vscode")
    const fs = require("fs")

    let start = vscode.window.activeTextEditor.document.lineCount
    let fileName = vscode.window.activeTextEditor.document.fileName

    console.log(start)
    console.log(fileName)
    fs.readFile(fileName, function (context) {

        var context_arr = context.split("\n")
        console.log(context)
        console.log(context_arr[start])
    })

} catch (error) {

    console.log(error)
}