Top ".net-standard-2.1" questions

'Could not load type 'Microsoft.AspNetCore.Mvc.MvcJsonOptions' from assembly 'Microsoft.AspNetCore.Mvc.Formatters.Json, Version=3.0.0.0

I'm using netstandard2.1 library in my netcoreapp3.0 web application. When adding my service in Startup, I'm getting the below error: …

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c# json.net asp.net-core-mvc asp.net-core-3.0 .net-standard-2.1
Project 'ClassLibrary1.csproj' targets 'netstandard2.1'. It cannot be referenced by a project that targets '.NETFramework,Version=v4.8'

I have some class library projects in targets netstandard2.1. When I referenced that to my WPF project in target .NET …

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c# .net .net-standard .net-4.8 .net-standard-2.1
.NET Standard and .NET Core 3.x or ASP.NET Core 3.x

I have few questions on the .NET Standard and the recently announced .NET Core 3.0 and ASP.NET Core 3.1 The previous …

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c# asp.net-core asp.net-core-mvc asp.net-core-3.0 .net-standard-2.1