Could not load file or assembly System.Fabric with Azure Functions

Are there any restrictions with packages you can use with Azure Functions. I have researched as much as I can and it doesn't seem so, however when I try creating an Azure Function that references the package "Microsoft.ServiceFabric" I get the following error:

System.Private.CoreLib: Exception while executing function: ScaleDownServiceFabrics. FunctionApp2: Could not load file or assembly 'System.Fabric, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. Could not find or load a specific file. (Exception from HRESULT: 0x80131621). System.Private.CoreLib: Could not load file or assembly 'System.Fabric, Version=6.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.

I have tried both Azure Func and.1 and 2, and .Net Framework and .Net Core with no luck.

using System;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;
using Microsoft.Extensions.Logging;
using System.Fabric;

namespace FunctionApp5
{
  public static class Function1
  {
    [FunctionName("Function1")]
    public static void Run([TimerTrigger("*/5 * * * * *")]TimerInfo myTimer, ILogger log)
    {
      log.LogInformation($"C# Timer trigger function executed at: {DateTime.Now}");
      FabricClient client = new FabricClient();
    }
  }
}

Is this possible, or a limitation of Azure Functions in Visual Studio - if so, what packages are acceptable?

Diego and Suraj have pointed out the cause, conflict between 64 and 32 bit.

Two points to fix

1. Set build platform to x64 like what you have done.
2. Get x64 Function runtime. Functions work on Function runtime(contained in Azure Function core tools), but the default bit is x86 downloaded by VS.

To get x64 bit in an easy way, let's use Nodejs to install Azure Functions Core Tools from NPM.

After installation, in cmd input npm i -g azure-functions-core-tools --unsafe-perm true to get Function core tools.

Then set project debug properties(right click on your project>Properties>Debug blade).

1. Set Launch type to Executable

2. Set Executable path to %appdata%\npm\node_modules\azure-functions-core-tools\bin\func.exe.

3. Add Application arguments start.