setup to use C# 9.0

vor 4 Monaten · a7827abc22
--- a/Smoll.csproj
+++ b/Smoll.csproj
@ -2,7 +2,7 @@

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net7.0</TargetFramework>
    <TargetFramework>net9.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>