add NLC readme

Author: mediumTaj

src/IBM.WatsonDeveloperCloud.NaturalLanguageClassifier.v1/README.md

@@ -0,0 +1,53 @@
+[![NuGet](https://img.shields.io/badge/nuget-v2.0.0-green.svg?style=flat)](https://www.nuget.org/packages/IBM.WatsonDeveloperCloud.NaturalLanguageClassifier.v1/)
+
+### Natural Language Classifier
+IBM Watson™ [Natural Language Classifier][natural_language_classifier] uses machine learning algorithms to return the top matching predefined classes for short text input. You create and train a classifier to connect predefined classes to example texts so that the service can apply those classes to new inputs.
+
+### Installation
+#### Nuget
+```
+
+PM > Install-Package IBM.WatsonDeveloperCloud.NaturalLanguageClassifier.v1
+
+```
+#### Project.json
+```JSON
+
+"dependencies": {
+   "IBM.WatsonDeveloperCloud.NaturalLanguageClassifier.v1": "2.0.0"
+}
+
+```
+### Usage
+IBM Watson™ Natural Language Classifier can help your application understand the language of short texts and make predictions about how to handle them. A classifier learns from your example data and then can return information for texts that it is not trained on.
+
+You can create and train a classifier in less than 15 minutes.
+
+#### Instantiating and authenticating the service
+Before you can send requests to the service it must be instantiated and credentials must be set.
+```cs
+// create a Natural Language Classifier Service instance
+NaturalLanguageClassifierService _naturalLanguageClassifierService = new NaturalLanguageClassifierService();
+
+// set the credentials
+_naturalLanguageClassifierService.SetCredential("<username>", "<password>");
+```
+
+#### Analyze
+Analyze features of natural language content.
+```cs
+ClassifyInput classifyInput = new ClassifyInput
+    {
+        Text = _textToClassify
+    };
+
+classifyResult = Classify(classifierId, classifyInput);
+```
+
+#### List Models
+List available [custom models][custom_models].
+```cs
+var listClassifiersResult = ListClassifiers();
+```
+
+[natural_language_classifier]: https://console.bluemix.net/docs/services/natural-language-classifier/getting-started.html