How to create @Html.TextAreaFor in c# asp.net mvc?

Question

Hi Team

 

I have created TextAreaFor but the problem is not showing off well and need some help around it. Here is my logic.

// Model
public string eNtsaTextAreaDisc { get; set; }

// View
<div class="col-sm-12">
@Html.TextAreaFor(m=>m.eNtsaAdmin.eNtsaTextAreaDisc, new {@class = "form-control"})
</div>

The output is as below, any better idea towards div col-sm-12?