Sharepoint : System.Web.HttpParseException (0x80004005): Value cannot be null. Parameter name: key

Not made any code change and still error appears. Below is the error detail. Kindly help

0x3474 SharePoint Foundation General ajlz0
High Getting Error Message for Exception System.Web.HttpParseException (0x80004005): Value cannot be null.
Parameter name: key

---> System.Web.HttpParseException (0x80004005): Value cannot be null. Parameter name: key ---> System.ArgumentNullException: Value cannot be null. Parameter name: key
at System.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument) at System.Collections.Generic.Dictionary`

2.FindEntry(TKey key) at System.Collections.Generic.Dictionary`

2.TryGetValue(TKey key, TValue& value)
at Microsoft.SharePoint.ApplicationRuntime.SafeAssemblyInfo.FindTypeEntryInfo(String typeFullName, String typeNamespace)
at Microsoft.SharePoint.ApplicationRuntime.SafeAssemblyInfo.FindTypeEntryInfo(Type type)
at Microsoft.SharePoint.ApplicationRuntime.SafeControls.FindTypeEntryInfo(Type type)
at Microsoft.SharePoint.ApplicationRuntime.SafeControls.IsSafeControl(Boolean isAppWeb, Type type, String& unsafeErrorMessage)
at Microsoft.SharePoint.ApplicationRuntime.SPPageParserFilter.AllowBaseType(Type baseType)
at System.Web.UI.TemplateParser.ProcessInheritsAttribute(String baseTypeName, String codeFileBaseTypeName, String src, Assembly assembly)
at System.Web.UI.TemplateParser.PostProcessMainDirectiveAttributes(IDictionary parseData)
at System.Web.UI.TemplateParser.ProcessException(Exception ex)
at System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding)
at System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding)

at System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding)     
at System.Web.UI.TemplateParser.ParseFile(String physicalPath, VirtualPath virtualPath)     
at System.Web.UI.TemplateParser.ParseInternal()     
at System.Web.UI.TemplateParser.Parse()     
at System.Web.Compilation.BaseTemplateBuildProvider.get_CodeCompilerType()     
at System.Web.Compilation.BuildProvider.GetCompilerTypeFromBuildProvider(BuildProvider buildProvider)     
at System.Web.Compilation.BuildProvidersCompiler.ProcessBuildProviders()     
at System.Web.Compilation.BuildProvidersCompiler.PerformBuild()     
at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath)     
at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)     
at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)     
at System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound)     
at System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp)     
at System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath)     
at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()     
at System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step)     at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)  1672999f-8c41-40cc-077e-d8dd4523d3cd