C# .NET API with upgraded .NET Framework support of the; .NET Framework 4.0, .NET Standard 2.1, .NET 6.0. .NET Framework 2.0 support has been dropped from API....C# .NET API with upgraded .NET Framework support of the; .NET Framework 4.0, .NET Standard 2.1, .NET 6.0. .NET Framework 2.0 support has been dropped from API.