<?php
echo "Hello World!";
?>

dies in vs2015 windows 10 php7.0.5

error:
Server Error in '/' Application.

[A]PHP.Core.PhpConfigurationContext cannot be cast to [B]PHP.Core.PhpConfigurationContext. Type A originates from 'PhpNetCore, Version=3.0.0.0, Culture=neutral, PublicKeyToken=0a8e8c4c76728c71' in the context 'Default' at location 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\PhpNetCore\v4.0_3.0.0.00a8e8c4c76728c71\PhpNetCore.dll'. Type B originates from 'PhpNetCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=0a8e8c4c76728c71' in the context 'Default' at location 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\PhpNetCore\v4.0_4.0.0.00a8e8c4c76728c71\PhpNetCore.dll'.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidCastException: [A]PHP.Core.PhpConfigurationContext cannot be cast to [B]PHP.Core.PhpConfigurationContext. Type A originates from 'PhpNetCore, Version=3.0.0.0, Culture=neutral, PublicKeyToken=0a8e8c4c76728c71' in the context 'Default' at location 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\PhpNetCore\v4.0_3.0.0.00a8e8c4c76728c71\PhpNetCore.dll'. Type B originates from 'PhpNetCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=0a8e8c4c76728c71' in the context 'Default' at location 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\PhpNetCore\v4.0_4.0.0.00a8e8c4c76728c71\PhpNetCore.dll'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[InvalidCastException: [A]PHP.Core.PhpConfigurationContext cannot be cast to [B]PHP.Core.PhpConfigurationContext. Type A originates from 'PhpNetCore, Version=3.0.0.0, Culture=neutral, PublicKeyToken=0a8e8c4c76728c71' in the context 'Default' at location 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\PhpNetCore\v4.0_3.0.0.00a8e8c4c76728c71\PhpNetCore.dll'. Type B originates from 'PhpNetCore, Version=4.0.0.0, Culture=neutral, PublicKeyToken=0a8e8c4c76728c71' in the context 'Default' at location 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\PhpNetCore\v4.0_4.0.0.00a8e8c4c76728c71\PhpNetCore.dll'.]
PHP.Core.ConfigurationSectionHandler.GetConfig(ApplicationContext appContext, String sectionName) +202
PHP.Core.Configuration.Load(ApplicationContext appContext) +107
PHP.Core.Configuration.Reload(ApplicationContext appContext, Boolean reloadFromFile) +73
PHP.Core.ScriptContext.InitWebRequest(ApplicationContext appContext, HttpContext context) +64
PHP.Core.RequestContext.Initialize(ApplicationContext appContext) +113
PHP.Core.RequestContext.Initialize(ApplicationContext appContext, HttpContext context) +356
PHP.Core.RequestHandler.ProcessRequest(HttpContext context) +200
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +188
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.6.1586.0