You can use multiple comma separated conditional attributes like

    [Conditional(&quot;DEBUG&quot;), Conditional(&quot;BAR&quot;)]

and it will be exactly your desired behaviour - they will be logically ORed together.

See [MSDN][1] for reference.


  [1]: https://msdn.microsoft.com/en-us/library/4xssyw96%28v=vs.90%29.aspx

I have the following postgres users which I can view by invoking the `\du` command in the terminal as follows:

    postgres=# \du 

                                List of roles
     Role name |                   Attributes                   | Member of
    -----------+------------------------------------------------+-----------
     postgres  | Superuser, Create role, Create DB, Replication | {}
     tutorial1 |                                                | {}


According to the [postgres documentation][1], I should be able to drop the user called &quot;tutorial1&quot; by entering the following command:

    postgres=# DROP USER tutorial1

However, when I use that command nothing happens.  The documentation doesn&#39;t provide any hints as to why this isn&#39;t working, nor does it provide clear examples.  

That being said-- what is the command to drop this user?  


  [1]: http://www.postgresql.org/docs/9.3/static/sql-dropuser.html

How to Drop User from Postgres Database

In Chrome, we get some weirdness

    &gt; new Date(&quot;2014-01-01&quot;) - new Date(&quot;2014/01/01&quot;)
    &lt; 3600000

And this is because 

    new Date(&quot;2014-01-01&quot;)
    Wed Jan 01 2014 01:00:00 GMT+0100 (CET)

while 

    new Date(&quot;2014/01/01&quot;)
    Wed Jan 01 2014 00:00:00 GMT+0100 (CET)

Why do the &#39;-&#39; seem to add 1 hour to the time?

Why is YYYY-MM-DD != YYYY/MM/DD

In C# we can differentiate code execution depending on the type of build. By default we have Debug and Release types defined.  
We can do it using the `#if` directive:

    #if DEBUG
        public void Foo()
        { ... }
    #endif
But we can also use `Conditional` attribute:

    [Conditional(&quot;DEBUG&quot;)]
    public void Foo()
    { ... }
The second solution is even claimed to be more maintainable (see: Effective C# by Bill Wagner).

My question is - how can I use the `Conditional` attribute with many build configurations? Is it possible to somehow use the `or` operator? I ask because I want some Foo method to be executed both in, for example, the DEBUG and BAR build configurations. What then?

Or operator in Conditional attribute in C#

In C# we can differentiate code execution depending on the type of build. By default we have Debug and Release types defined. 
We can do it using the <code>#if</code> directive:
<pre><code class="hljs language-csharp">#if DEBUG
 public void Foo()
 { ... }
#endif
</code></pre>
But we can also use <code>Conditional</code> attribute:
<pre><code class="hljs language-csharp">[Conditional("DEBUG")]
public void Foo()
{ ... }
</code></pre>
The second solution is even claimed to be more maintainable (see: Effective C# by Bill Wagner).
My question is - how can I use the <code>Conditional</code> attribute with many build configurations? Is it possible to somehow use the <code>or</code> operator? I ask because I want some Foo method to be executed both in, for example, the DEBUG and BAR build configurations. What then?

Would this be classified as an O(1) algorithm for &quot;Hello, World!&quot; ??

    public class Hello1
    {
       public static void Main()
       {
          DateTime TwentyYearsLater = new DateTime(2035,01,01);
          while ( DateTime.Now &lt; TwentyYearsLater )
          { 
              System.Console.WriteLine(&quot;It&#39;s still not time to print the hello ...&quot;);
          }
          System.Console.WriteLine(&quot;Hello, World!&quot;);
       }
    }

I&#39;m thinking of using the 

    DateTime TwentyYearsLater = new DateTime(2035,01,01);
    while ( DateTime.Now &lt; TwentyYearsLater )
    { 
       // ... 
    }

snippet of code as a busy loop to put in as a joke whenever someone asks for an algorithm of a certain complexity. Would this be correct?

Is this technically an O(1) algorithm for &quot;Hello World&quot;?

In my ASP.NET 5 (RC1) code I have an appsetting.json that looks something like this:

    {
        &quot;SomeSettings&quot;: {
            &quot;PropA&quot;: &quot;ValueA&quot;,
            &quot;PropB&quot;: [
                &quot;ValueB1&quot;,
                &quot;ValueB2&quot;
            ]
        }
    }

These value are used when a run the code on my dev machine (ie. localhost). If I want to overwrite the &quot;SomeSettings&quot; in Azure&#39;s Application settings for the wep app, how would I specify the &quot;PropB&quot; array?

The SomeSettings.cs class that I want to store the information in looks like this:

    public class SomeSettings
    {
        public string PropA { get; set; }
        public List&lt;string&gt; PropB { get; set; }
    }

The problem is &quot;PropB&quot; - how to I specify an array or List as a string in Azure - is this even possible?

In my Startup class&#39;s constructor I have:

    var builder = new ConfigurationBuilder()
        .AddJsonFile(&quot;appsettings.json&quot;)
        .AddEnvironmentVariables();

And in my Startup class&#39;s Configure methods I have:

    var someSettings = configuration.GetSection(&quot;SomeSettings&quot;).Get&lt;SomeSettings&gt;();






Using an array in Azure web app settings

I have an Outlook 2013 and 2016 VSTO Add-in project and am trying to add a WPF user control to a custom task pane as described [here][1].

The problem I have is when I add the User Control (WPF) it generates me a WPF control with a grid, but automatically throws an error of &quot;The type &#39;UserControl&#39; does not support direct content&quot;.

WPF generated:

    &lt;UserControl x:Class=&quot;TestNamespace.UserControl1&quot;
             xmlns=&quot;http://schemas.microsoft.com/winfx/2006/xaml/presentation&quot;
             xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
             xmlns:mc=&quot;http://schemas.openxmlformats.org/markup-compatibility/2006&quot; 
             xmlns:d=&quot;http://schemas.microsoft.com/expression/blend/2008&quot; 
             xmlns:local=&quot;clr-namespace:TestNamespace&quot;
             mc:Ignorable=&quot;d&quot; 
             d:DesignHeight=&quot;300&quot; d:DesignWidth=&quot;300&quot;&gt;
    &lt;Grid&gt;
            
    &lt;/Grid&gt;
    &lt;/UserControl&gt;

I know in the past I have had to add the WPF project type guid to the .proj file to get some things to work, but adding this made no difference (in fact it would not even load when in a certain order).

Original:

    &lt;ProjectTypeGuids&gt;{BAA0C2D2-18E2-41B9-852F-F413020CAA33};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}&lt;/ProjectTypeGuids&gt;
Crashes:

    &lt;ProjectTypeGuids&gt;{BAA0C2D2-18E2-41B9-852F-F413020CAA33};{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}&lt;/ProjectTypeGuids&gt;

Doesn&#39;t crash, but doesn&#39;t fix the error:

    &lt;ProjectTypeGuids&gt;{60dc8134-eba5-43b8-bcc9-bb4bc16c2548};{BAA0C2D2-18E2-41B9-852F-F413020CAA33};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}&lt;/ProjectTypeGuids&gt;

Can anyone point me in the right direction?

**UPDATE**

I tried creating a new class library project straight out of the box, added a WPF user control, then added the reference to System.Xaml and I have the same issue.

  [1]: https://msdn.microsoft.com/en-us/library/bb772076.aspx

The type &#39;UserControl&#39; does not support direct content

I&#39;m using json.net (Newtonsoft&#39;s JsonSerializer). I need to customize serialization in order to meet following requirements:

 1. property names must start with lower case letter.
 2. Dictionary&lt;string, T&gt; must be serialized into jsonp where keys will be used for property names. LowerCase rule does not apply for dictionary keys.

for example:

    var product = new Product();
    procuct.Name = &quot;Product1&quot;;
    product.Items = new Dictionary&lt;string, Item&gt;();
    product.Items.Add(&quot;Item1&quot;, new Item { Description=&quot;Lorem Ipsum&quot; });

must serialize into:

    {
      name: &quot;Product1&quot;,
      items : {
        &quot;Item1&quot;: {
           description : &quot;Lorem Ipsum&quot;
        }
      }
    }

notice that property Name serializes into &quot;name&quot;, but key Item1 serializes into &quot;Item1&quot;;

I have tried to create CustomJsonWriter to serialize property names, but it changes also dicionary keys.

    public class CustomJsonWriter : JsonTextWriter
    {
        public CustomJsonWriter(TextWriter writer) : base(writer)
        {
            
        }
        public override void WritePropertyName(string name, bool escape)
        {
            if (name != &quot;$type&quot;)
            {
                name = name.ToCamelCase();
            }
            base.WritePropertyName(name, escape);
        }
    }


Newtonsoft JsonSerializer - Lower case properties and dictionary

In C# I can convert doubles to floats by a cast `(float)` or by `Convert.ToSingle()`.

	double x = 3.141592653589793238463;
	float a = (float)x;
	float b = Convert.ToSingle(x);

`a` and `b` become equal.

Are there any differences between both techniques? Which one should I prefer and why?

Content Type	Original Author	Original Content on Stackoverflow
Question	Arkadiusz Kałkus	View Question on Stackoverflow
Solution 1 - C#	Andrey Korneyev	View Answer on Stackoverflow

Or operator in Conditional attribute in C#

C# Problem Overview

C# Solutions

Solution 1 - C#

Why is YYYY-MM-DD != YYYY/MM/DD

How to Drop User from Postgres Database

Attributions