MVC3 Razor Parser Error on For-loop

I am a newbie in MVC3 Razor world. I get parser error message for following code in a view (cshtml):

@for ( Int32 i = 0 ; i < Model.JobFiles.Count ; i++) 
{
    <div class="editor-label">
        @Html.LabelFor(model => model.JobFiles[i].DisplayName)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.JobFiles[i].DisplayName)
        @Html.ValidationMessageFor(model => model.JobFiles[i].DisplayName)
    </div>

The parser error message (translated from german to english)

"for" was not expected after the "@" sign. Within the code the construct such as "for" must have no "@".

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But if I remove the "@" I get compiler error, because variable i is not defined.

I need your help and hint for best practice to solve the issue. Thank you in advance.

PS: the code fragment on my first posting was wrong. It is edited now.

I found out the solution by myself: removing the @ from 'for' and put @using System on top of file. Thx to ppl who tried to help me.