我最近开始研究一些课程并为单项目做出贡献。它实际上并不像我期望的那样艰难....但我有一个问题，只是在一些本地构建后突然出现....以下来自xsp服务器：
An exception has occurred while generating HttpException page:
System.NullReferenceException: Object reference not set to an instance of an object
at System.Web.Util.HttpEncoder.GetCustomEncoderFromConfig () [0x00006] in /Volumes/build-root-ramdisk/mono-3.8.0/mcs/class/System.Web/System.Web.Util/HttpEncoder.cs:194
at System.Lazy``1[System.Web.Util.HttpEncoder].InitValue () [0x0015f] in /Volumes/build-root-ramdisk/mono-3.8.0/mcs/class/corlib/System/Lazy.cs:164
接下来是：
The actual exception which was being reported was:
System.Web.HttpException: Initial exception ---> System.InvalidCastException: Cannot cast from source type to destination type.
at System.Web.HttpRuntime..cctor () [0x00051] in /Volumes/build-root-ramdisk/mono-3.8.0/mcs/class/System.Web/System.Web/HttpRuntime.cs:138
--- End of inner exception stack trace ---
我可以看到此代码如下：
runtime_section = (HttpRuntimeSection) WebConfigurationManager.GetSection ("system.web/httpRuntime");
所以演员阵容失败了......我假设我有一些错误的组装在某个地方，但实际上找不到它。
这似乎发生在任何新的MVC项目和之前工作的项目上。
有什么建议吗？