Initial C# SDK structure and interfaces

Interfaces/IDatabaseAPI.cs

@@ -0,0 +1,10 @@
+namespace Chtn.CSharpSDK.Interfaces
+{
+    public interface IDatabaseAPI
+    {
+        void Set(string collection, string key, object value);
+        string Get(string collection, string key);
+        void Delete(string collection, string key);
+        void Flush();
+    }
+}