When I load the LOCALFILEBROWSER demo into VS2010 beta 2, the reference to liquid.dll produces the following error:

Error 7 The "ValidateXaml" task failed unexpectedly.

System.IO.FileLoadException: Could not load file or assembly 'file:///c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\Silverlight\v4.0\Liquid.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)

File name: 'file:///c:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\Silverlight\v4.0\Liquid.dll' ---> System.NotSupportedException: An attempt was made to load an assembly from a network location which would have caused the assembly to be sandboxed in previous versions of the .NET Framework. This release of the .NET Framework does not enable CAS policy by default, so this load may be dangerous. If this load is not intended to sandbox the assembly, please enable the loadFromRemoteSources switch. See http://go.microsoft.com/fwlink/?LinkId=155569 for more information.

   at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)

   at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks)

   at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks)

   at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark)

   at System.Reflection.Assembly.LoadFrom(String assemblyFile)

   at Microsoft.Silverlight.Build.Tasks.ValidateXaml.XamlValidator.Execute(ITask task)

   at Microsoft.Silverlight.Build.Tasks.ValidateXaml.XamlValidator.Execute(ITask task)

   at Microsoft.Silverlight.Build.Tasks.ValidateXaml.Execute()

   at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()

   at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask, Boolean& taskResult)

LocalFileBrowser

This occurs with other examples that invoke the Vectorlight dll's as well. Obviously, I'm not installing or referencing the liquid.dll correctly or enabling CAS policy. However, I would expect the demo's to work on Win7/VS2010 beta w/out much tweaking.

Can you help me understand what I'm doing wrong? Thanks.

Ok... figured it out. Windows 7 blocked the DLL's since they were downloaded from the internet. Just needed to bring up each DLL in Win Explorer -- select PROPERTIES and click the UNBLOCK button. It wasn't obvious since Windows does not provide any clue that these DLL's have been rendered inactive.

Hi,

Thanks for posting this and maybe it will be useful to others.  Windows isn't very helpful when it comes to this DLL blocking functionality.

Thanks!