From 38d729026c2bccd361bb64a61f2e806ab245fb6d Mon Sep 17 00:00:00 2001
From: Phillip Hoff <phillip.hoff@gmail.com>
Date: Wed, 29 Apr 2026 09:46:17 -0700
Subject: [PATCH] Multi-target NuGet libraries for net8.0 and net10.0

Add net8.0 alongside net10.0 as a target framework for the three
NuGet-published libraries (EncDotNet.Iso8211, EncDotNet.S57, and
EncDotNet.Noaa) to broaden consumer reach to .NET 8 LTS. The
ChartViewer, Console, Benchmarks, and UnitTests projects continue
to target net10.0 only.

The libraries' source already uses only APIs and language features
available in .NET 8, so no source changes or #if guards are required.

TargetFramework is explicitly cleared in each csproj to override the
single-TFM default inherited from Directory.Build.props.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 src/EncDotNet.Iso8211/EncDotNet.Iso8211.csproj | 2 ++
 src/EncDotNet.Noaa/EncDotNet.Noaa.csproj       | 2 ++
 src/EncDotNet.S57/EncDotNet.S57.csproj         | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/src/EncDotNet.Iso8211/EncDotNet.Iso8211.csproj b/src/EncDotNet.Iso8211/EncDotNet.Iso8211.csproj
index 7c31525..1f3f5a6 100644
--- a/src/EncDotNet.Iso8211/EncDotNet.Iso8211.csproj
+++ b/src/EncDotNet.Iso8211/EncDotNet.Iso8211.csproj
@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
+        <TargetFramework></TargetFramework>
+        <TargetFrameworks>net8.0;net10.0</TargetFrameworks>
         <Description>A .NET parser for the ISO/IEC 8211 binary container format, the underlying encoding used by IHO S-57 electronic navigational charts and other geospatial data standards.</Description>
         <PackageTags>iso8211;iso-8211;binary-parser;s57;s-57;enc;nautical-chart;hydrographic;geospatial;maritime</PackageTags>
         <PackageReadmeFile>README.md</PackageReadmeFile>
diff --git a/src/EncDotNet.Noaa/EncDotNet.Noaa.csproj b/src/EncDotNet.Noaa/EncDotNet.Noaa.csproj
index 387b5c8..23f5ef5 100644
--- a/src/EncDotNet.Noaa/EncDotNet.Noaa.csproj
+++ b/src/EncDotNet.Noaa/EncDotNet.Noaa.csproj
@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
+        <TargetFramework></TargetFramework>
+        <TargetFrameworks>net8.0;net10.0</TargetFrameworks>
         <Description>A .NET client for the NOAA ENC product catalog, for discovering and downloading U.S. electronic navigational chart data.</Description>
         <PackageTags>noaa;enc;nautical-chart;s57;s-57;hydrographic;maritime;navigation;chart-data;geospatial</PackageTags>
         <PackageReadmeFile>README.md</PackageReadmeFile>
diff --git a/src/EncDotNet.S57/EncDotNet.S57.csproj b/src/EncDotNet.S57/EncDotNet.S57.csproj
index 213502c..5c22dda 100644
--- a/src/EncDotNet.S57/EncDotNet.S57.csproj
+++ b/src/EncDotNet.S57/EncDotNet.S57.csproj
@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
+        <TargetFramework></TargetFramework>
+        <TargetFrameworks>net8.0;net10.0</TargetFrameworks>
         <Description>A .NET library for reading and working with IHO S-57 Electronic Navigational Charts (ENCs), including feature records, vector topology, exchange sets, and incremental updates.</Description>
         <PackageTags>s57;s-57;enc;nautical-chart;hydrographic;maritime;navigation;iho;electronic-navigational-chart;geospatial;gis</PackageTags>
         <PackageReadmeFile>README.md</PackageReadmeFile>