visual studio professional 2019 unable to start

While starting visual studio professional getting below error

visual studio pops up error while starting

below is event viewer details

Application: devenv.exe Framework Version: v4.0.30319 Description: The process was terminated due to an unhandled exception. Exception Info:

       System.Runtime.InteropServices.SEHException
   at System.RuntimeTypeHandle.GetDeclaringType(System.RuntimeType)
    at System.RuntimeType+RuntimeTypeCache.GetEnclosingType()
   at System.RuntimeType.get_DeclaringType()
   at Microsoft.VisualStudio.Composition.AttributedPartDiscovery.CreatePart(System.Type, Boolean)
   at Microsoft.VisualStudio.Composition.PartDiscovery+CombinedPartDiscovery.CreatePart(System.Type, Boolean)
   at Microsoft.VisualStudio.Composition.PartDiscovery+<>c__DisplayClass31_0.<CreateDiscoveryBlockChain>b__0(System.Type)
   at System.Threading.Tasks.Dataflow.TransformBlock`2[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ProcessMessage(System.Func`2<System.__Canon,System.__Canon>, System.Collections.Generic.KeyValuePair`2<System.__Canon,Int64>)
   at System.Threading.Tasks.Dataflow.TransformBlock`2+<>c__DisplayClass9_0[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].<.ctor>b__3(System.Collections.Generic.KeyValuePair`2<System.__Canon,Int64>)
   at System.Threading.Tasks.Dataflow.Internal.TargetCore`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ProcessMessagesLoopCore()
   at System.Threading.Tasks.Dataflow.Internal.TargetCore`1+<>c[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].<ProcessAsyncIfNecessary_Slow>b__34_0(System.Object)
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   at System.Threading.Tasks.Task.ExecutionContextCallback(System.Object)
   at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef)
   at System.Threading.Tasks.Task.ExecuteEntry(Boolean)
   at System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()

More errors from event viewer

Faulting application name: devenv.exe, version: 16.7.30503.244, time stamp: 0x5f51e008 Faulting module name: clr.dll, version: 4.8.4200.0, time stamp: 0x5ee03350 Exception code: 0xc0000006 Fault offset: 0x000be77f Faulting process id: 0x1704 Faulting application start time: 0x01d68b1020f38cff Faulting application path: D:\Program Files (x86)\Microsoft Visual Studio\2019\Professional\Common7\IDE\devenv.exe Faulting module path: C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll Report Id: 45fa9bf7-3920-4a6a-a2b2-219401ffec92 Faulting package full name: Faulting package-relative application ID: