Webseiteninhalte neben Sidebar platzieren

Gerne hätte ich den Inhalt der Webseite neben der Sidebar stehen. Wie gehe ich da am Besten vor? Benutzte Technologien bisher ASP.NET Core, Razor, JavaScript und Bootstrap.
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Der hier verwendete Code

<!DOCTYPE html>
<html lang="de-DE">
<head>
<style>
body {
padding-top: 50px;
padding-bottom: 20px;
}
/* Wrapping element */
/* Set some basic padding to keep content from hitting the edges */
.body-content {
padding-left: 15px;
padding-right: 15px;
}
/* Carousel */
.carousel-caption p {
font-size: 20px;
line-height: 1.4;
}
/* Make .svg files in the carousel display properly in older browsers */
.carousel-inner .item img[src$=".svg"] {
width: 100%;
}
/* QR code generator */
#qrCode {
margin: 15px;
}
th.header {
padding-bottom: 15px;
}
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