Answers for "Missing compiler required member 'Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo.Create' unity"

Missing compiler required member unity

//You just need to set the Api Compatibility Level to .Net 4.x
//in your Player Settings, if you need to use the dynamic keyword.

Missing compiler required member 'Microsoft.CSharp.RuntimeBinder.CSharpArgumentInfo.Create'

1) Search "Nuget" in Visual Studio help bar and click on 
	"Manage Nuget Packages"
2) When the package manager is opened, search "Microsoft.CSharp"
3) Install the "Microsoft.CSharp" package