Removed the concept of a 'local session'. If a session is passed in,

it will not be disposed off on the dispose method of CassandraContext like
normal. Added a CloseClient method to CassandraSession and call it in the
finally block of CassandraContext::ExecuteOperation to, based on the pool
type, close the connection to the server, or release the connection back
to the pool. This should suffice contexts being kept around for a while be
it in a static var etc etc. We definetly need to rework the connection
concepts but for the mean time this should work.

FluentCassandra.sln

@@ -1,6 +1,6 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2012
+# Visual Studio 2010
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FluentCassandra", "src\FluentCassandra.csproj", "{EAA32600-3C2A-4B34-B9B2-5764F280FCE3}"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FluentCassandra.Sandbox", "test\FluentCassandra.Sandbox\FluentCassandra.Sandbox.csproj", "{DE6B46DE-C37A-49AF-8B9A-B9B6D4F03A55}"

src/CassandraContext.cs

@@ -371,24 +371,22 @@ public TResult ExecuteOperation<TResult>(Operation<TResult> action, bool? throwO
 			if (WasDisposed)
 				throw new ObjectDisposedException(GetType().FullName);
 
-			var localSession = _session == null;
-			var session = _session;
-			if (session == null)
-				session = new CassandraSession(ConnectionBuilder);
+			if (_session == null)
+                _session = new CassandraSession(ConnectionBuilder);
 
 			action.Context = this;
 
 			try
 			{
-				var result = session.ExecuteOperation(action, throwOnError ?? ThrowErrors);
-				LastError = session.LastError;
+                var result = _session.ExecuteOperation(action, throwOnError ?? ThrowErrors);
+                LastError = _session.LastError;
 
 				return result;
 			}
 			finally
 			{
-				if (localSession && session != null)
-					session.Dispose();
+                if (_session != null)
+                    _session.CloseClient();
 			}
 		}
 

src/CassandraSession.cs

@@ -117,6 +117,15 @@ internal CassandraClientWrapper GetClient(bool setKeyspace = true, bool? setCqlV
 			return new CassandraClientWrapper(_connection.Client);
 		}
 
+
+        internal void CloseClient()
+        {
+            if (_connection != null)
+            {
+                ConnectionProvider.Close(_connection);
+            }
+        }
+
 		/// <summary>
 		/// 
 		/// </summary>