I am very curious about the new .NET Core, ASP.NET 5, EF 7 and Visual Studio Code for Linux, Mac and Windows. I have tried it out on an Ubuntu 15.04 machine. The installation and configuration required a few steps, so it is not an usual “Next-next-next”-installation. But, hey, it is just a beta, a preview so far, and first of all: It worked. I am sharing a couple of screenshots and the commands I ran in the terminal, mixed with comments and links:

Recently an issue was reported about count mismatches in SharePoint 2013 Communities. The number of replies in category tiles sometimes is different compared to the community stats in the web part called “What’s happening”. The actual number of replies is 1 in the figure below. The user who has reported has tried to add, update and delete discussions and replies.

I have invested some time debugging this issue. It would be pity to not share my findings. Well the first thing to do was to determine the type name for the “What’s happening” web part. To do so just edit the  page and export the web part. In the exported .webpart file I saw that the type was Microsoft.SharePoint.Portal.WebControls.DashboardWebPart. With that knowledge it is time to open ILSpy, an awesome and free(!) assembly browser and decompiler. Load the “Microsoft.SharePoint.Portal” assembly from GAC into ILSpy. Then use F3 to search for DashboardWebPart:

I use @-prefixed strings very often. You can use line breaks as much as you want. Very useful e.g. when I must create an xml in code. One thing I didn’t know was that you CAN use quotation marks inside @-strings. But you must write double quoutes like:

var t = @"säg ""hej""
		och ""hå""";

Have you wondered what to use a singleton object  or a class with static methods. Well, here is an awesome comparision of these techniques. Static methods and classes are easy to use, but you can’t them as objects, implement interfaces and have constructors with parameters.

Do an unsafe update in a unified manner « Sharepoint. Kunskap. Upptäckter på resan. - 2011-09-03

[…] Log class is my own class which I presented in my previous post. Like this:GillaBli först att gilla denna […]

Here is a simple log which has been inspired of Android Log. It logs to ULS which you can open with ULSViewer, SharePoint Log Viewer.

using System;
using Microsoft.SharePoint.Administration;

namespace Contoso.Intranet.Portal.Utilities
{
    public class Log
    {
        private static readonly string \_CATEGORYNAME = "CONTOSO";
        private static readonly SPDiagnosticsCategory \_ERROR\_CATEGORY = 
              new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.Unexpected, EventSeverity.Error);
        private static readonly SPDiagnosticsCategory \_WARNING\_CATEGORY = 
              new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.High, EventSeverity.Warning);
        private static readonly SPDiagnosticsCategory \_VERBOSE\_CATEGORY = 
              new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.Verbose, EventSeverity.Verbose);
        private static readonly SPDiagnosticsCategory \_INFO\_CATEGORY = 
              new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.Medium, EventSeverity.Information);

        private static void WriteTrace(SPDiagnosticsCategory category, string message, string trace)
        {
            SPDiagnosticsService.Local.WriteTrace(0, category, category.DefaultTraceSeverity, message, trace);
        }

        public static void Error(Exception ex)
        {
            WriteTrace(\_ERROR\_CATEGORY, ex.Message, ex.StackTrace);
        }

        public static void Warning(string message)
        {
            WriteTrace(\_WARNING\_CATEGORY, message, "");
        }

        public static void Verbose(string message)
        {
            WriteTrace(\_VERBOSE\_CATEGORY, message, "");
        }

        public static void Info(string message)
        {
            WriteTrace(\_INFO\_CATEGORY, message, "");
        }

    }
}

A possible improvement can be a custom Area. See an example of ThorstenHans on Github: CustomLogger.cs EDIT: I found an interesting article: How to log to the SharePoint ULS Logs: Clean Debugging and Error Logging broken down into steps written by Philip Stathis.

Här finns en lista över formateringsmöjligheter med C# string.Format

String.Format("{0:00000}", 15);          // "00015"

En intressant variant av foreach är ForEach-metoden i List. Titta på det lilla exemplet:

private static void SavePlacesToDB(SQLiteConnection cnn, 
                                     List<dynamic> places)
{
    places.ForEach(obj => SavePlaceToDB(obj, cnn));
}
```Här används även det nya objektet [dynamic](http://msdn.microsoft.com/en-us/library/dd264736.aspx) som har kommit i Visual Studio 2010, samt en [lambda expression (=>)](http://msdn.microsoft.com/en-us/library/bb397687.aspx).

Det är väldigt smidigt att koppla datakälla till en ListView i WPF. Man skriver kod i XAML. Och i koden bakom anger man: myListView.ItemsSource = myList;

Om en metod har en inparameter med out framför sig. så innebär det att man skickar en referens till ett objekt. Alltså om det är out string param, så kommer det inte funka att skicka “någonting” direkt. Utan man måste instansiera först. string hej = “någonting”; CallTheMethod(ref hej); http://msdn.microsoft.com/en-us/library/t3c3bfhx(VS.80).aspx