Input text box and drop down, need help in adding bootstrap look and field. MVC

I have the following code and I'm trying to add the bootstrap look and field to the control... I need help...

Here is the code....

@using (Html.BeginForm())
    {
        
    <p>

     
            Find by Last Name or First Name: @Html.TextBox("SearchString", ViewBag.CurrentFilter as String)
        
            Location: @Html.DropDownList("LocationList", "All")
            <input type="submit" value="Search" />
        </p>

    }

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