Render a string as HTML in C# Razor

Use @Html.Raw(Model.MyData.Address.Replace("\r\n", "<br />"))

Use

@(new HtmlString(@Model.MyData.Address))

It is safer, so that you avoid potential xss attacks

See this post: Rendering HTML as HTML in Razor

Use css to preserve the white space

Html

<div id="addressLine">
  @Model.MyData.Address;
</div>

Css

#addressLine {
  white-space: pre;
}