dotnet: Try to add a README.md to package

cmake/dotnet.cmake

@@ -287,6 +287,13 @@ target_link_libraries(google-ortools-native PRIVATE dotnet_model_builder)
 
 file(COPY ${PROJECT_SOURCE_DIR}/tools/doc/orLogo.png DESTINATION ${PROJECT_BINARY_DIR}/dotnet)
 set(DOTNET_LOGO_DIR "${PROJECT_BINARY_DIR}/dotnet")
+
+configure_file(
+  ${PROJECT_SOURCE_DIR}/ortools/dotnet/README.dotnet.md
+  ${PROJECT_BINARY_DIR}/dotnet/README.md
+  COPYONLY)
+set(DOTNET_README_DIR "${PROJECT_BINARY_DIR}/dotnet")
+
 configure_file(${PROJECT_SOURCE_DIR}/ortools/dotnet/Directory.Build.props.in ${PROJECT_BINARY_DIR}/dotnet/Directory.Build.props)
 
 ############################

ortools/dotnet/Directory.Build.props.in

@@ -14,6 +14,7 @@
        <!-- Pack Option -->
        <PackageTags>native;math;LinearSolver;LinearProgramming;ConstraintSolver;ConstraintProgramming</PackageTags>
        <PackageIcon>content/orLogo.png</PackageIcon>
+       <PackageReadmeFile>content/README.md</PackageReadmeFile>
        <PackageProjectUrl>https://developers.google.com/optimization</PackageProjectUrl>
        <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
        <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
@@ -29,6 +30,10 @@
       <Pack>True</Pack>
       <PackagePath>content</PackagePath>
     </None>
+    <None Include="@DOTNET_README_DIR@/README.md">
+      <Pack>True</Pack>
+      <PackagePath>content</PackagePath>
+    </None>
   </ItemGroup>
   <PropertyGroup Label="BasePath">
     <SolutionDir Condition="'$(SolutionDir)'==''">$(MSBuildThisFileDirectory)</SolutionDir>

ortools/dotnet/README.dotnet.md

@@ -0,0 +1,67 @@
+# Google OR-Tools
+
+This is the .NET wrapper of OR-Tools.
+
+## About OR-Tools
+
+Google Optimization Tools (a.k.a. OR-Tools) is open source, fast and portable
+software suite for solving *combinatorial optimization problems*, which seeks
+to find the best solution to a problem out of a very large set of possible
+solutions. Here are some examples of problems that OR-Tools solves:
+
+* Vehicle routing: Find optimal routes for vehicle fleets that pick up and
+  deliver packages given constraints (e.g., "this truck can't hold more than
+  20,000 pounds" or "all deliveries must be made within a two-hour window").
+* Scheduling: Find the optimal schedule for a complex set of tasks, some of
+  which need to be performed before others, on a fixed set of machines, or
+  other resources.
+* Bin packing: Pack as many objects of various sizes as possible into a fixed
+  number of bins with maximum capacities.
+
+In most cases, problems like these have a vast number of possible solutions—too
+many for a computer to search them all. To overcome this, OR-Tools uses
+state-of-the-art algorithms to narrow down the search set, in order to find an
+optimal (or close to optimal) solution.
+
+OR-Tools includes solvers for:
+
+### Constraint Programming
+
+A set of techniques for finding feasible solutions to a problem expressed as
+constraints (e.g., a room can't be used for two events simultaneously, or the
+distance to the crops must be less than the length of the hose, or no more than
+five TV shows can be recorded at once).
+
+### Linear and Mixed-Integer Programming
+
+The Glop linear optimizer finds the optimal value of a linear objective
+function, given a set of linear inequalities as constraints (e.g., assigning
+people to jobs, or finding the best allocation of a set of resources while
+minimizing cost). The mixed-integer programming software SCIP is also available.
+
+### Vehicle Routing
+
+A specialized library for identifying best vehicle routes given constraints.
+
+### Graph Algorithms
+
+Code for finding shortest paths in graphs, min-cost flows, max flows, and linear sum assignments.
+
+## Roadmap
+
+See the [open issues](https://github.com/google/or-tools/issues) for a list of
+proposed features and known issues.
+
+## Contributing
+
+The [CONTRIBUTING.md](https://github.com/google/or-tools/blob/main/CONTRIBUTING.md)
+file contains instructions on how to submit the Contributor License Agreement
+before sending any pull requests (PRs).
+
+Of course, if you're new to the project, it's usually best to discuss any
+proposals and reach consensus before sending your first PR.
+
+## License
+
+The OR-Tools software suite is licensed under the terms of the Apache License 2.0.
+