Top 20 NuGet formattablestring Packages

Provides FormattableString/FormattableStringFactory for pre-4.6 .NET Framework.
This file is duplicated here so that assemblies built for versions of the .NET framework earlier than 4.6 can run with C# 6 features - namely the FormattableString.
Diagnostics analyzer: when interpolated string ($"...") is used as an object, will force it to be cast to FormattableString (this will preserve raw data values and is very useful, for example, when unit testing log messages).