where I can get the software of SOLRNET
Download the binaries from NuGet or newer binaries from the build server (recommended)
how to install it.
Add a reference to SolrNet.dll in your project, then see the docs for information on how to use it in your project.
So is this a port to Solr in java
No, it's a client for the Solr server. You still need the Solr server. If you want to run Solr without a Java runtime, you might be interested in this article I wrote recently.
