Add Nullable reference types to new projects (Fluent)
MODIFY
WalletWasabi.Fluent.Desktop/WalletWasabi.Fluent.Desktop.csproj
WalletWasabi.Fluent.Desktop/WalletWasabi.Fluent.Desktop.csproj
<PropertyGroup>
<OutputType>WinExe</OutputType>
<TargetFramework>netcoreapp3.1</TargetFramework>
+ <Nullable>enable</Nullable>
</PropertyGroup>
<PropertyGroup>

MODIFY
WalletWasabi.Fluent/WalletWasabi.Fluent.csproj
WalletWasabi.Fluent/WalletWasabi.Fluent.csproj
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netcoreapp3.1</TargetFramework>
+ <Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<Compile Update="**\*.xaml.cs">

Add Nullable reference types to new projects (Fluent)