I found this tool, http://sab39.netreach.com/Software/Japitools/JDK-Results/46/, which checks for backwards compatibility between different versions of APIs for Java using javadoc.
Is there an tool equivalent to this one for C#/.NET?
Here is an example of a comparison between JDK 1.5 and JDK 6 APIs using this tool:
http://www.kaffe.org/~stuart/japi/htmlout/h-jdk15-jdk6
ApiChange does take a set of "old" assemblies and a set of "new" assemblies which are diffed for potentially breaking Api changes:
ApiChange -diff -old HelloWorldV1.dll -new HelloWorldV2.dll
LibCheck allows you to compare two versions of an assembly and determine the differences. The tool reports the differences as a combination of "removed" and "added" APIs:
LibCheck -store HelloWorld.dll 1.0 -full C:\HelloWorldV1\
LibCheck -store HelloWorld.dll 2.0 -full C:\HelloWorldV2\
LibCheck -compare 1.0 2.0
See also "Working with LibCheck", "Highlight Public API Differences Between Assembly Revisions" and "Api Diff Between Assemblies" articles.
I haven't tried the Java tool you linked to, but NDepend has some powerful tools for comparing two sets of binaries and highlighting any differences.
I haven't tested it, but this library
https://github.com/tunnelvisionlabs/dotnet-compatibility
seems to provide what you'd want.
https://raw.githubusercontent.com/tunnelvisionlabs/dotnet-compatibility/master/CompatibilityCheckExample/Program.cs
IPackageRepository sourceRepository = PackageRepositoryFactory.Default.CreateRepository("https://www.nuget.org/api/v2/");
PackageManager packageManager = new PackageManager(sourceRepository, temporaryDirectory);
packageManager.PackageInstalled += HandlePackageInstalled;
packageManager.InstallPackage("Microsoft.Bcl.Immutable", SemanticVersion.Parse("1.0.34"));
packageManager.InstallPackage("System.Collections.Immutable", SemanticVersion.Parse("1.1.33-beta"));
using (PEReader referenceAssembly = new PEReader(File.OpenRead(Path.Combine(temporaryDirectory, "Microsoft.Bcl.Immutable.1.0.34", "lib", "portable-net45+win8+wp8+wpa81", "System.Collections.Immutable.dll"))))
{
using (PEReader newAssembly = new PEReader(File.OpenRead(Path.Combine(temporaryDirectory, "System.Collections.Immutable.1.1.33-beta", "lib", "portable-net45+win8+wp8+wpa81", "System.Collections.Immutable.dll"))))
{
Analyzer analyzer = new Analyzer(referenceAssembly, newAssembly, null);
analyzer.Run();
}
}