Errors show up after adding a Blob trigger function on Azure Function V2 Project with "Microsoft.NET.Sdk.Functions" verison 1.0.21 : "Metadata generation failed.".

With latest 15.9 preview:

1. File > New Project > Azure Functions >Azure Functions v2 (.Net Core) with Empty template + Storage Emulator selected. 2.Open Manage Nuget Packages to update the “Microsoft.NET.Sdk.Functions” verison to 1.0.21
2. Right click project -> Add New Item-> New Azure Function… 4.Select the Blob trigger function and set the connection to “AzureWebJobsStorage”.Click OK.
3. Build.

Then, errors shows up in the error list.

ACTUAL

Severity	Code	Description	Project	File	Line	Suppression State
Error		System.IO.FileNotFoundException: Could not load file or assembly ‘Microsoft.Azure.WebJobs, Version=3.0.0.0, Culture=neutral, PublicKeyToken=null’ or one of its dependencies. The system cannot find the file specified.File name: ‘Microsoft.Azure.WebJobs, Version=3.0.0.0, Culture=neutral, PublicKeyToken=null’   at System.ModuleHandle.ResolveType(RuntimeModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type)   at System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)   at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments)   at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(CustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg)   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent)   at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeParameterInfo parameter, RuntimeType caType)   at System.Attribute.InternalParamGetCustomAttributes(ParameterInfo param, Type type, Boolean inherit)   at MakeFunctionJson.ParameterInfoExtensions.GetDisabledAttribute(ParameterInfo parameterInfo)   at System.Linq.Enumerable.WhereSelectArrayIterator2.MoveNext()   at System.Linq.Enumerable.WhereEnumerableIterator1.MoveNext()   at System.Linq.Enumerable.FirstOrDefault[TSource](IEnumerable1 source)   at MakeFunctionJson.MethodInfoExtensions.GetDisabled(MethodInfo method)   at MakeFunctionJson.MethodInfoExtensions.HasUnsuportedAttributes(MethodInfo method, String& error)   at MakeFunctionJson.FunctionJsonConverter.<GenerateFunctions>d__9.MoveNext()   at System.Collections.Generic.List1…ctor(IEnumerable1 collection)   at System.Linq.Enumerable.ToList[TSource](IEnumerable1 source)   at MakeFunctionJson.FunctionJsonConverter.TryGenerateFunctionJsons()   at MakeFunctionJson.FunctionJsonConverter.TryRun()WRN: Assembly binding logging is turned OFF.To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.Note: There is some performance penalty associated with assembly bind failure logging.To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].Error generating functions metadata	FunctionApp6	C:\Users\v-lingyx.nuget\packages\microsoft.net.sdk.functions\1.0.21\build\netstandard1.0\Microsoft.NET.Sdk.Functions.Build.targets	39
Error		Metadata generation failed.	FunctionApp6	C:\Users\v-lingyx.nuget\packages\microsoft.net.sdk.functions\1.0.21\build\netstandard1.0\Microsoft.NET.Sdk.Functions.Build.targets	39

[jasonrmartin]

I have the same issue. Switching back to Microsoft.NET.Sdk.Function v1.0.22 fixed for me.

[JohnReeson]

Should have been fixed in 1.0.24, issue can be closed.