@model TimeSpan?
@{
	Layout = "~/Views/Shared/DisplayTemplates/_FieldLayout.cshtml";
    var val = 
		Model.HasValue 
		?
			ViewData.ModelMetadata.DisplayFormatString != null
			? string.Format(ViewData.ModelMetadata.DisplayFormatString, Model) 
			: Model.Value.ToReadableString()
		: string.Empty;
}

@(Model == null ? Html.Encode(ViewData.ModelMetadata.NullDisplayText) : Html.Encode(val))