我尝试使用以下方法安装SignalR：
install-package Microsoft.AspNet.SignalR
我使用Visual Studio 2012.完成教程：Getting Started with SignalR 2.0 and MVC 5
当我尝试安装＆＃39; Signalr＆＃39;并收到一条错误，指出Specified argument was out of the range of valid values. Parameter name: supportedFrameworks。任何人都知道为什么会这样？以下是完整输出：
Attempting to resolve dependency 'Microsoft.AspNet.SignalR.JS (≥ 2.0.2)'.
Attempting to resolve dependency 'jQuery (≥ 1.6.4)'.
Attempting to resolve dependency 'Microsoft.AspNet.SignalR.SystemWeb (≥ 2.0.2)'.
Attempting to resolve dependency 'Microsoft.AspNet.SignalR.Core (≥ 2.0.2)'.
Attempting to resolve dependency 'Newtonsoft.Json (≥ 5.0.0)'.
Attempting to resolve dependency 'Owin (≥ 1.0)'.
Attempting to resolve dependency 'Microsoft.Owin (≥ 2.0.0)'.
Attempting to resolve dependency 'Microsoft.Owin.Security (≥ 2.0.0)'.
Attempting to resolve dependency 'Microsoft.Owin.Host.SystemWeb (≥ 2.0.0)'.
Installing 'Newtonsoft.Json 5.0.1'.
Successfully installed 'Newtonsoft.Json 5.0.1'.
Installing 'Owin 1.0'.
Successfully installed 'Owin 1.0'.
Installing 'Microsoft.Owin 2.0.0'.
You are downloading Microsoft.Owin from Microsoft, the license agreement to which is available at http://www.microsoft.com/web/webpi/eula/aspnetcomponent_rtw_enu.htm. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'Microsoft.Owin 2.0.0'.
Installing 'Microsoft.Owin.Security 2.0.0'.
You are downloading Microsoft.Owin.Security from Microsoft, the license agreement to which is available at http://www.microsoft.com/web/webpi/eula/aspnetcomponent_rtw_enu.htm. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'Microsoft.Owin.Security 2.0.0'.
Installing 'Microsoft.AspNet.SignalR.Core 2.0.2'.
You are downloading Microsoft.AspNet.SignalR.Core from Microsoft, the license agreement to which is available at http://www.microsoft.com/web/webpi/eula/aspnetcomponent_rtw_ENU.htm. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'Microsoft.AspNet.SignalR.Core 2.0.2'.
Installing 'Microsoft.Owin.Host.SystemWeb 2.0.0'.
You are downloading Microsoft.Owin.Host.SystemWeb from Microsoft, the license agreement to which is available at http://www.microsoft.com/web/webpi/eula/aspnetcomponent_rtw_enu.htm. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'Microsoft.Owin.Host.SystemWeb 2.0.0'.
Installing 'Microsoft.AspNet.SignalR.SystemWeb 2.0.2'.
You are downloading Microsoft.AspNet.SignalR.SystemWeb from Microsoft, the license agreement to which is available at http://www.microsoft.com/web/webpi/eula/aspnetcomponent_rtw_ENU.htm. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'Microsoft.AspNet.SignalR.SystemWeb 2.0.2'.
Installing 'Microsoft.AspNet.SignalR 2.0.2'.
You are downloading Microsoft.AspNet.SignalR from Microsoft, the license agreement to which is available at http://www.microsoft.com/web/webpi/eula/aspnetcomponent_rtw_ENU.htm. Check the package for additional dependencies, which may come with their own license agreement(s). Your use of the package and dependencies constitutes your acceptance of their license agreements. If you do not accept the license agreement(s), then delete the relevant components from your device.
Successfully installed 'Microsoft.AspNet.SignalR 2.0.2'.
Adding 'jQuery 1.6.4' to SignalRChat2.
Successfully added 'jQuery 1.6.4' to SignalRChat2.
Adding 'Microsoft.AspNet.SignalR.JS 2.0.2' to SignalRChat2.
Successfully added 'Microsoft.AspNet.SignalR.JS 2.0.2' to SignalRChat2.
Removing 'Newtonsoft.Json 4.5.11' from SignalRChat2.
Install failed. Rolling back...
install-package : Specified argument was out of the range of valid values.
Parameter name: supportedFrameworks
At line:1 char:1
+ install-package Microsoft.AspNet.SignalR
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [Install-Package], ArgumentOutOfRangeException
+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand
我尝试更改框架4,4.5,4.5.1 for MVC 4,5。所有都有相同的问题
答案 0 :(得分：0)
你可以尝试从Tools-＆gt; Extension和Updates安装最新的NuGet，看看这是否还在复制？