along with this:
Message: The type initializer for 'DavisLibrary.MainWorker' threw an exception.
Source: ACLog
StackTrace: ? ?at DavisLibrary.MainWorker.OnStart() in E:\C#-CI\N3FJP Software\aclog\MainWorker.cs:line 136
? ?at DavisLibrary.Form1..ctor() in E:\C#-CI\N3FJP Software\aclog\Form1.cs:line 871
TargetSite: Void OnStart()
Message: Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
Source: mscorlib
StackTrace: ? ?at System.ModuleHandle.ResolveMethod(RuntimeModule module, Int32 methodToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount)
? ?at System.ModuleHandle.ResolveMethodHandleInternalCore(RuntimeModule module, Int32 methodToken, IntPtr[] typeInstantiationContext, Int32 typeInstCount, IntPtr[] methodInstantiationContext, Int32 methodInstCount)
? ?at System.ModuleHandle.ResolveMethodHandleInternal(RuntimeModule module, Int32 methodToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
? ?at System.Reflection.CustomAttributeData..ctor(RuntimeModule scope, CustomAttributeRecord caRecord)
? ?at System.Reflection.CustomAttributeData.GetCustomAttributes(RuntimeModule module, Int32 tkTarget)
? ?at System.Reflection.CustomAttributeData.GetCustomAttributesInternal(RuntimeAssembly target)
? ?at System.Reflection.RuntimeAssembly.GetCustomAttributesData()
? ?at System.Reflection.CustomAttributeData.GetCustomAttributes(Assembly target)
? ?at System.Resources.ManifestBasedResourceGroveler.GetNeutralResourcesLanguage(Assembly a, UltimateResourceFallbackLocation& fallbackLocation)
? ?at System.Resources.ResourceManager.CommonSatelliteAssemblyInit()
? ?at System.Resources.ResourceManager..ctor(Type resourceSource)
? ?at System.ComponentModel.ComponentResourceManager..ctor(Type t)
? ?at DavisLibrary.frmDXSpotting.InitializeComponent() in E:\C#-CI\N3FJP Software\N3FJP_Shared\frmDXSpotting.designer.cs:line 32
? ?at DavisLibrary.frmDXSpotting..ctor(TelnetWorker telnetWorker, clsTelnet cTelnet) in E:\C#-CI\N3FJP Software\N3FJP_Shared\frmDXSpotting.cs:line 27
? ?at DavisLibrary.TelnetWorker..ctor() in E:\C#-CI\N3FJP Software\N3FJP_Shared\TelnetWorker.cs:line 19
? ?at DavisLibrary.MainWorker..cctor() in E:\C#-CI\N3FJP Software\aclog\MainWorker.cs:line 51
TargetSite: System.RuntimeMethodHandleInternal ResolveMethod(System.Reflection.RuntimeModule, Int32, IntPtr*, Int32, IntPtr*, Int32)?