dotnet: migrate from .Net 6.0 to 8.0 as default

Mizux · Mizux · commit 8ae6f8b5d64c · 2025-04-11T16:36:57.000+02:00
diff --git a/cmake/README.md b/cmake/README.md
@@ -246,9 +246,9 @@ cmake -S. -Bbuild -LH
 | `USE_DOTNET_48`  | OFF | Enable .Net Framework 4.8 support<br>Only available if `BUILD_DOTNET=ON` |
 | `USE_DOTNET_STD_21`  | OFF | Enable .Net Standard 2.1 support<br>Only available if `BUILD_DOTNET=ON` and not targeting arm64 platform |
 | `USE_DOTNET_CORE_31`  | OFF | Enable .Net Core 3.1 LTS support<br>Only available if `BUILD_DOTNET=ON` and not targeting arm64 platform |
-| `USE_DOTNET_6`  | ON | Enable .Net 6 LTS support<br>Only available if `BUILD_DOTNET=ON` |
+| `USE_DOTNET_6`  | OFF | Enable .Net 6 LTS support<br>Only available if `BUILD_DOTNET=ON` |
 | `USE_DOTNET_7`  | OFF | Enable .Net 7 support<br>Only available if `BUILD_DOTNET=ON` |
-| `USE_DOTNET_8`  | OFF | Enable .Net 8 LTS support<br>Only available if `BUILD_DOTNET=ON` |
+| `USE_DOTNET_8`  | ON  | Enable .Net 8 LTS support<br>Only available if `BUILD_DOTNET=ON` |
 | `USE_DOTNET_9`  | OFF | Enable .Net 9 support<br>Only available if `BUILD_DOTNET=ON` |
 | `UNIVERSAL_DOTNET_PACKAGE`  | OFF | Build a multi platform package (i.e. `Google.OrTools` will depends on all runtime packages)<br>Only available if `BUILD_DOTNET=ON` |
 | | | |
diff --git a/cmake/samples/dotnet/Google.Sample.csproj b/cmake/samples/dotnet/Google.Sample.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <LangVersion>8.0</LangVersion>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <!-- see https://github.com/dotnet/docs/issues/12237 -->
     <RollForward>LatestMajor</RollForward>
     <AssemblyName>Google.Sample</AssemblyName>
diff --git a/examples/dotnet/README.md b/examples/dotnet/README.md
@@ -3,7 +3,7 @@
 The following examples showcase how to use OrTools.<br>
 The project solution has examples for C#.
 
-We recommend that all projects you create target `net6.0`,
+We recommend that all projects you create target `net8.0`,
 as this allows you to compile for various frameworks and
 keep up-to-date with the latest frameworks.
 
diff --git a/makefiles/Makefile.cpp.mk b/makefiles/Makefile.cpp.mk
@@ -41,7 +41,7 @@ USE_SCIP ?= ON
 USE_CPLEX ?= OFF
 
 USE_DOTNET_CORE_31 ?= OFF
-USE_DOTNET_6 ?= ON
+USE_DOTNET_8 ?= ON
 BUILD_VENV ?= ON
 JOBS ?= 4
 
@@ -72,7 +72,7 @@ third_party:
  -DUSE_SCIP=$(USE_SCIP) \
  -DUSE_CPLEX=$(USE_CPLEX) \
  -DUSE_DOTNET_CORE_31=$(USE_DOTNET_CORE_31) \
- -DUSE_DOTNET_6=$(USE_DOTNET_6) \
+ -DUSE_DOTNET_8=$(USE_DOTNET_8) \
  -DBUILD_VENV=$(BUILD_VENV) \
  -DCMAKE_BUILD_TYPE=$(BUILD_TYPE) \
  -DCMAKE_INSTALL_PREFIX=$(INSTALL_DIR) \
diff --git a/makefiles/Makefile.dotnet.mk b/makefiles/Makefile.dotnet.mk
@@ -110,12 +110,12 @@ $(TEMP_DOTNET_DIR)/$1/%/%.csproj: \
  > $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
 	$(SED) -i -e 's/@DOTNET_SAMPLE_LANG@/9.0/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
-ifeq ($(USE_DOTNET_6)_$(USE_DOTNET_CORE_31),ON_ON)
-	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net6.0<\/TargetFrameworks>/' \
+ifeq ($(USE_DOTNET_8)_$(USE_DOTNET_CORE_31),ON_ON)
+	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net8.0<\/TargetFrameworks>/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
 else
- ifeq ($(USE_DOTNET_6),ON)
-	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>net6.0<\/TargetFramework>/' \
+ ifeq ($(USE_DOTNET_8),ON)
+	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>net8.0<\/TargetFramework>/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
  else
 	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>netcoreapp3.1<\/TargetFramework>/' \
@@ -151,9 +151,9 @@ rdotnet_%: \
  $(TEMP_DOTNET_DIR)/$1/%/%.csproj \
  $(TEMP_DOTNET_DIR)/$1/%/%.cs \
  FORCE
-ifeq ($(USE_DOTNET_6),ON)
-	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework net6.0 -c Release
-	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" run --no-build --framework net6.0 -c Release $(ARGS)
+ifeq ($(USE_DOTNET_8),ON)
+	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework net8.0 -c Release
+	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" run --no-build --framework net8.0 -c Release $(ARGS)
 endif
 ifeq ($(USE_DOTNET_CORE_31),ON)
 	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework netcoreapp3.1 -c Release
@@ -184,12 +184,12 @@ $(TEMP_DOTNET_DIR)/$1/%/%.csproj: \
  > $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
 	$(SED) -i -e 's/@DOTNET_SAMPLE_LANG@/9.0/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
-ifeq ($(USE_DOTNET_6)_$(USE_DOTNET_CORE_31),ON_ON)
-	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net6.0<\/TargetFrameworks>/' \
+ifeq ($(USE_DOTNET_8)_$(USE_DOTNET_CORE_31),ON_ON)
+	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net8.0<\/TargetFrameworks>/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
 else
- ifeq ($(USE_DOTNET_6),ON)
-	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>net6.0<\/TargetFramework>/' \
+ ifeq ($(USE_DOTNET_8),ON)
+	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>net8.0<\/TargetFramework>/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
  else
 	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>netcoreapp3.1<\/TargetFramework>/' \
@@ -225,9 +225,9 @@ rdotnet_%: \
  $(TEMP_DOTNET_DIR)/$1/%/%.csproj \
  $(TEMP_DOTNET_DIR)/$1/%/%.cs \
  FORCE
-ifeq ($(USE_DOTNET_6),ON)
-	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework net6.0 -c Release
-	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" run --no-build --framework net6.0 -c Release $(ARGS)
+ifeq ($(USE_DOTNET_8),ON)
+	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework net8.0 -c Release
+	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" run --no-build --framework net8.0 -c Release $(ARGS)
 endif
 ifeq ($(USE_DOTNET_CORE_31),ON)
 	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework netcoreapp3.1 -c Release
@@ -255,12 +255,12 @@ $(TEMP_DOTNET_DIR)/$1/%/%.csproj: \
  > $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
 	$(SED) -i -e 's/@DOTNET_LANG@/9.0/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
-ifeq ($(USE_DOTNET_6)_$(USE_DOTNET_CORE_31),ON_ON)
-	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net6.0<\/TargetFrameworks>/' \
+ifeq ($(USE_DOTNET_8)_$(USE_DOTNET_CORE_31),ON_ON)
+	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net8.0<\/TargetFrameworks>/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
 else
- ifeq ($(USE_DOTNET_6),ON)
-	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>net6.0<\/TargetFramework>/' \
+ ifeq ($(USE_DOTNET_8),ON)
+	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>net8.0<\/TargetFramework>/' \
  $(TEMP_DOTNET_DIR)$S$1$S$$*$S$$*.csproj
  else
 	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFramework>netcoreapp3.1<\/TargetFramework>/' \
@@ -296,9 +296,9 @@ rdotnet_%: \
  $(TEMP_DOTNET_DIR)/$1/%/%.csproj \
  $(TEMP_DOTNET_DIR)/$1/%/%.cs \
  FORCE
-ifeq ($(USE_DOTNET_6),ON)
-	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework net6.0 -c Release
-	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" test --no-build --framework net6.0 -c Release $(ARGS)
+ifeq ($(USE_DOTNET_8),ON)
+	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework net8.0 -c Release
+	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" test --no-build --framework net8.0 -c Release $(ARGS)
 endif
 ifeq ($(USE_DOTNET_CORE_31),ON)
 	cd $(TEMP_DOTNET_DIR)$S$1$S$$* && "$(DOTNET_BIN)" build --framework netcoreapp3.1 -c Release
@@ -659,7 +659,7 @@ $(TEMP_DOTNET_DIR)/ortools_examples/examples/dotnet/%.csproj: \
  $(TEMP_DOTNET_DIR)$Sortools_examples$Sexamples$Sdotnet$S$$*.csproj
 	$(SED) -i -e 's/@DOTNET_SAMPLE_LANG@/9.0/' \
  $(TEMP_DOTNET_DIR)$Sortools_examples$Sexamples$Sdotnet$S$$*.csproj
-	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net6.0<\/TargetFrameworks>/' \
+	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net8.0<\/TargetFrameworks>/' \
  $(TEMP_DOTNET_DIR)$Sortools_examples$Sexamples$Sdotnet$S$$*.csproj
 	$(SED) -i -e 's/@DOTNET_PROJECT@/$(DOTNET_ORTOOLS_ASSEMBLY_NAME)/' \
  $(TEMP_DOTNET_DIR)$Sortools_examples$Sexamples$Sdotnet$S$$*.csproj
@@ -694,7 +694,7 @@ $(TEMP_DOTNET_DIR)/ortools_examples/examples/dotnet/%.csproj: \
  $(TEMP_DOTNET_DIR)$Sortools_examples$Sexamples$Sdotnet$S$$*.csproj
 	$(SED) -i -e 's/@DOTNET_SAMPLE_LANG@/9.0/' \
  $(TEMP_DOTNET_DIR)$Sortools_examples$Sexamples$Sdotnet$S$$*.csproj
-	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net6.0<\/TargetFrameworks>/' \
+	$(SED) -i -e 's/@DOTNET_TFM@/<TargetFrameworks>netcoreapp3.1;net8.0<\/TargetFrameworks>/' \
  $(TEMP_DOTNET_DIR)$Sortools_examples$Sexamples$Sdotnet$S$$*.csproj
 	$(SED) -i -e 's/@DOTNET_PROJECT@/$(DOTNET_ORTOOLS_ASSEMBLY_NAME)/' \
  $(TEMP_DOTNET_DIR)$Sortools_examples$Sexamples$Sdotnet$S$$*.csproj
@@ -741,7 +741,7 @@ endif
 ######################
 .PHONY: nuget_archive # Build .Net "Google.OrTools" Nuget Package
 nuget_archive: dotnet | $(TEMP_DOTNET_DIR)
-	"$(DOTNET_BIN)" publish $(DOTNET_BUILD_ARGS) --no-build --no-dependencies --no-restore -f net6.0 \
+	"$(DOTNET_BIN)" publish $(DOTNET_BUILD_ARGS) --no-build --no-dependencies --no-restore -f net8.0 \
  -o "..$S..$S..$S$(TEMP_DOTNET_DIR)" \
  ortools$Sdotnet$S$(DOTNET_ORTOOLS_ASSEMBLY_NAME)$S$(DOTNET_ORTOOLS_ASSEMBLY_NAME).csproj
 	"$(DOTNET_BIN)" pack -c Release $(NUGET_PACK_ARGS) --no-build \
@@ -750,7 +750,7 @@ nuget_archive: dotnet | $(TEMP_DOTNET_DIR)
 
 .PHONY: nuget_upload # Upload Nuget Package
 nuget_upload: nuget_archive
-	@echo Uploading Nuget package for "netcoreapp3.1;net6.0".
+	@echo Uploading Nuget package for "netcoreapp3.1;net8.0".
 	$(warning Not Implemented)
 
 endif  # HAS_DOTNET=ON
diff --git a/ortools/dotnet/CreateSigningKey/CreateSigningKey.csproj b/ortools/dotnet/CreateSigningKey/CreateSigningKey.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net6.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <Version>1.0.0</Version>
 
     <!-- Nuget Properties -->
diff --git a/ortools/dotnet/README.md b/ortools/dotnet/README.md
@@ -25,11 +25,11 @@ and osx-x64) nuget package using `dotnet` and few `.csproj`.
 
 ## Requirement
 
-The library is compiled against `netcoreapp3.1` and `net6.0`, so you'll only
+The library is compiled against `netcoreapp3.1` and `net8.0`, so you'll only
 need:
 
 * .Net Core 3.1 LTS SDK
-* .Net 6.0 LTS SDK
+* .Net 8.0 LTS SDK
 
 note: We won't/can't rely on VS 2022 since we want a portable cross-platform
 [`dotnet/cli`](https://github.com/dotnet/cli) pipeline.
@@ -230,7 +230,7 @@ defined) should have this layout:
       \- Google.OrTools.dll
 ...
 ```
-note: `{framework}` could be `netcoreapp3.1` or/and `net6.0`
+note: `{framework}` could be `netcoreapp3.1` or/and `net8.0`
 
 ### Complete Google.OrTools Package
 
@@ -278,7 +278,7 @@ dotnet pack <build_dir>/dotnet/Google.OrTools
 
 ## Examples
 
-The Test projects show examples of building applications with `net6.0`.
+The Test projects show examples of building applications with `net8.0`.
 
 The F# example folder shows how to compile against the typical .NET Framework
 installed on machine.
diff --git a/tools/Makefile.dotnet.mk b/tools/Makefile.dotnet.mk
@@ -89,7 +89,7 @@ endif #ifeq SOURCE exist
 build: $(SOURCE)
 	"$(DOTNET_BIN)" build examples/$(SOURCE_NAME)/project.csproj
 run: build
-	"$(DOTNET_BIN)" run --no-build --framework net6.0 --project examples/$(SOURCE_NAME)/project.csproj -- $(ARGS)
+	"$(DOTNET_BIN)" run --no-build --framework net8.0 --project examples/$(SOURCE_NAME)/project.csproj -- $(ARGS)
 
 endif #ifeq SOURCE
 
diff --git a/tools/README.cc.java.dotnet b/tools/README.cc.java.dotnet
@@ -101,12 +101,12 @@ make run SOURCE=examples/dotnet/Vrp/Vrp.cs
 
   ```shell
   dotnet build examples/dotnet/Vrp/Vrp.csproj
-  dotnet run --no-build --framework net6.0 --project examples/dotnet/Vrp/Vrp.csproj
+  dotnet run --no-build --framework net8.0 --project examples/dotnet/Vrp/Vrp.csproj
   ```
 
 - on Windows:
 
   ```shell
   dotnet build examples\dotnet\Vrp\Vrp.csproj
-  dotnet run --no-build --framework net6.0 --project examples\dotnet\Vrp\Vrp.csproj
+  dotnet run --no-build --framework net8.0 --project examples\dotnet\Vrp\Vrp.csproj
   ```
