System.IO.IOException: The process cannot access the file 'E:\Inetpub\dynamicweb.net\Solutions\no-frederiksen.espresso.dw.webtester.dk\Application\espresso.log' because it is being used by another process.
   at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
   at System.IO.StreamWriter.CreateFile(String path, Boolean append, Boolean checkHost)
   at System.IO.StreamWriter..ctor(String path, Boolean append, Encoding encoding, Int32 bufferSize, Boolean checkHost)
   at System.IO.StreamWriter..ctor(String path, Boolean append, Encoding encoding)
   at Co3.Espresso.Dw8.Configuration.Tools.Log(String message, String[] parameters) in c:\Data\Dev\git\Co3\espresso-solution\Co3.Espresso.Dynamicweb8\Configuration\Tools.cs:line 275
   at Co3.Espresso.Dw8.Extenders.Products.ProductFilesProductExtender.ExtendTemplate(Template template, ProductTemplateExtender extender, CacheEngine cacheEngine) in c:\Data\Dev\git\Co3\espresso-solution\Co3.Espresso.Dynamicweb8\Extenders\Products\ProductFilesProductExtender.cs:line 75
   at Co3.Espresso.Dw8.Extenders.ProductExtender.ExtendTemplate(Template template) in c:\Data\Dev\git\Co3\espresso-solution\Co3.Espresso.Dynamicweb8\Extenders\ProductExtender.cs:line 90
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProductTemplateExtenders(Product Product, Template Template, Boolean ExtendedProperties)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProduct(Product Product, Boolean ExtendedProperties, Template Template, Int32 loopCounter, Boolean renderRelated, String productURL, Int32 quantity, Int32 wishListID, Boolean renderPublicList, Int32 orderLineOfProductCount)
   at Dynamicweb.eCommerce.Frontend.Renderer.RenderProduct(Product Product, Boolean ExtendedProperties)
   at Dynamicweb.eCommerce.Frontend.Frontend.EcomRender()
   at Dynamicweb.eCommerce.Frontend.Frontend.GetContent()
   at Dynamicweb.Frontend.Content.GetModule(DataRow& ParagraphRow)