Fixing some issues with the IPC communication implementation

There's still more to do to ensure seamless IPC communication. Basically, we need to get rid of the requirement of marking stuff as Serializable, and for omitting stuff that we don't really need by marking them as NonSerialized

Uhm.. JSON?

src/NAppUpdate.Framework/Common/UpdateProgressInfo.cs

@@ -1,7 +1,11 @@
-namespace NAppUpdate.Framework.Common
+using System;
+
+namespace NAppUpdate.Framework.Common
 {
+	[Serializable]
 	public delegate void ReportProgressDelegate(UpdateProgressInfo currentStatus);
 
+	[Serializable]
 	public class UpdateProgressInfo
 	{
 		public int TaskId { get; set; }
@@ -12,6 +16,7 @@ public class UpdateProgressInfo
 		public bool StillWorking { get; set; }
 	}
 
+	[Serializable]
 	public class DownloadProgressInfo : UpdateProgressInfo
 	{
 		public long FileSizeInBytes { get; set; }

src/NAppUpdate.Framework/Sources/IUpdateSource.cs

@@ -3,8 +3,6 @@
 
 namespace NAppUpdate.Framework.Sources
 {
-
-
     public interface IUpdateSource
     {
         string GetUpdatesFeed();

src/NAppUpdate.Framework/Tasks/FileUpdateTask.cs

@@ -46,6 +46,7 @@ public BooleanCondition UpdateConditions
 			set { _updateConditions = value; }
 		}
 
+		[field:NonSerialized]
     	public event ReportProgressDelegate OnProgress;
 
     	public bool Prepare(Sources.IUpdateSource source)

src/NAppUpdate.Framework/Tasks/IUpdateTask.cs

@@ -1,8 +1,10 @@
-using NAppUpdate.Framework.Common;
+using System;
+using NAppUpdate.Framework.Common;
 using NAppUpdate.Framework.Conditions;
 
 namespace NAppUpdate.Framework.Tasks
 {
+	[Serializable]
 	public enum TaskExecutionStatus
 	{
 		Pending,

src/NAppUpdate.Framework/UpdateManager.cs

@@ -59,6 +59,7 @@ public static UpdateManager Instance
 		/// <summary>
 		/// State of the update process
 		/// </summary>
+		[Serializable]
 		public enum UpdateProcessState
 		{
 			NotChecked,

src/NAppUpdate.Framework/Utils/NauIpc.cs

@@ -115,6 +115,7 @@ public static Process LaunchProcessAndSendDto(NauDto dto, ProcessStartInfo proce
 					using (var fStream = new FileStream(clientPipeHandle, FileAccess.Write, (int)BUFFER_SIZE, true))
 					{
 						new BinaryFormatter().Serialize(fStream, dto);
+						fStream.Flush();
 						fStream.Close();
 					}
 				}