使用 NuGet 下载包后程序集未加载

我创建了一个新的Web项目。使用 NuGet 包添加了 EPPlus 库，然后从 codeplex EPPlus 页面添加了以下代码。

    FileInfo newFile = new FileInfo(@"c:'sample1.xlsx");
    if (newFile.Exists)
    {
        newFile.Delete();  // ensures we create a new workbook
        newFile = new FileInfo(@"c:'sample1.xlsx");
    }
    using (ExcelPackage package = new ExcelPackage(newFile))
    {
        // add a new worksheet to the empty workbook
        ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Inventory");
        //Add the headers
        worksheet.Cells[1, 1].Value = "ID";
        worksheet.Cells[1, 2].Value = "Product";
        worksheet.Cells[1, 3].Value = "Quantity";
        worksheet.Cells[1, 4].Value = "Price";
        worksheet.Cells[1, 5].Value = "Value";
        //Add some items...
        worksheet.Cells["A2"].Value = 12001;
        worksheet.Cells["B2"].Value = "Nails";
        worksheet.Cells["C2"].Value = 37;
        worksheet.Cells["D2"].Value = 3.99;
        worksheet.Cells["A3"].Value = 12002;
        worksheet.Cells["B3"].Value = "Hammer";
        worksheet.Cells["C3"].Value = 5;
        worksheet.Cells["D3"].Value = 12.10;
        worksheet.Cells["A4"].Value = 12003;
        worksheet.Cells["B4"].Value = "Saw";
        worksheet.Cells["C4"].Value = 12;
        worksheet.Cells["D4"].Value = 15.37;
        //Add a formula for the value-column
        worksheet.Cells["E2:E4"].Formula = "C2*D2";
        //Ok now format the values;
        using (var range = worksheet.Cells[1, 1, 1, 5])
        {
            range.Style.Font.Bold = true;
            range.Style.Fill.PatternType = ExcelFillStyle.Solid;
            range.Style.Fill.BackgroundColor.SetColor(Color.DarkBlue);
            range.Style.Font.Color.SetColor(Color.White);
        }
        worksheet.Cells["A5:E5"].Style.Border.Top.Style = ExcelBorderStyle.Thin;
        worksheet.Cells["A5:E5"].Style.Font.Bold = true;
        worksheet.Cells[5, 3, 5, 5].Formula = string.Format("SUBTOTAL(9,{0})", new ExcelAddress(2, 3, 4, 3).Address);
        worksheet.Cells["C2:C5"].Style.Numberformat.Format = "#,##0";
        worksheet.Cells["D2:E5"].Style.Numberformat.Format = "#,##0.00";
        //Create an autofilter for the range
        worksheet.Cells["A1:E4"].AutoFilter = true;
        worksheet.Cells["A2:A4"].Style.Numberformat.Format = "@";   //Format as text
        worksheet.Cells.AutoFitColumns(0);  //Autofit columns for all cells
        // lets set the header text 
        worksheet.HeaderFooter.OddHeader.CenteredText = "&24&U&'"Arial,Regular Bold'" Inventory";
        // add the page number to the footer plus the total number of pages
        worksheet.HeaderFooter.OddFooter.RightAlignedText =
            string.Format("Page {0} of {1}", ExcelHeaderFooter.PageNumber, ExcelHeaderFooter.NumberOfPages);
        // add the sheet name to the footer
        worksheet.HeaderFooter.OddFooter.CenteredText = ExcelHeaderFooter.SheetName;
        // add the file path to the footer
        worksheet.HeaderFooter.OddFooter.LeftAlignedText = ExcelHeaderFooter.FilePath + ExcelHeaderFooter.FileName;
        worksheet.PrinterSettings.RepeatRows = worksheet.Cells["1:2"];
        worksheet.PrinterSettings.RepeatColumns = worksheet.Cells["A:G"];
        // Change the sheet view to show it in page layout mode
        worksheet.View.PageLayoutView = true;
        // set some document properties
        package.Workbook.Properties.Title = "Invertory";
        package.Workbook.Properties.Author = "Jan Källman";
        package.Workbook.Properties.Comments = "This sample demonstrates how to create an Excel 2007 workbook using EPPlus";
        // set some extended property values
        package.Workbook.Properties.Company = "AdventureWorks Inc.";
        // set some custom property values
        package.Workbook.Properties.SetCustomPropertyValue("Checked by", "Jan Källman");
        package.Workbook.Properties.SetCustomPropertyValue("AssemblyName", "EPPlus");
        // save our new workbook and we are done!
        package.Save();
    }

问题：执行此代码后，出现以下错误：

这是我的csproj文件中EPPLus的条目：

假 ..''packages''EPPlus.3.1.3.3''lib'et35''EPPlus.dll

这是packages.config的外观：

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="EPPlus" version="3.1.3.3" targetFramework="net35" />
</packages>

无法加载文件或程序集"EPPlus，版本=3.0.0.2， Culture=中性，PublicKeyToken=ea159fdaa78159a1'或其之一 依赖。找到的程序集的清单定义没有 匹配程序集引用。(HRESULT的例外：0x80131040(

不确定，我该怎么办？请帮忙。

谢谢