Framework 4: no need to use StreamWriter:

    System.IO.File.WriteAllLines(&quot;SavedLists.txt&quot;, Lists.verbList);

Assuming your Generic List is of type String:

    TextWriter tw = new StreamWriter(&quot;SavedList.txt&quot;);
    
    foreach (String s in Lists.verbList)
       tw.WriteLine(s);
     
    tw.Close();



Alternatively, with the using keyword:

    using(TextWriter tw = new StreamWriter(&quot;SavedList.txt&quot;))
    {
       foreach (String s in Lists.verbList)
          tw.WriteLine(s);
    }



@Jon&#39;s answer is great and will get you where you need to go. So why is your code printing out what it is. The answer: You&#39;re not writing out the contents of your list, but the String representation of *your list itself*, by an implicit call to Lists.verbList.ToString(). [Object.ToString()][1] defines the default behavior you&#39;re seeing here. 


  [1]: http://msdn.microsoft.com/en-us/library/system.object.tostring.aspx

I&#39;m using bootstrap tabs and it works perfectly.
I&#39;m trying to figure out if there is a way to use bootstrap to give a border to the contents of the tabs that is connected to the border of the pill so it will look like one box. 
I tried doing this with my own css, but there is a cap between the tab pill border and tab content border that is a margin the tab pill needs to have and can&#39;t be removed.
I want it to look like the below image.
![tab content with border][1]


  [1]: http://i.stack.imgur.com/YQnHp.png

how to give a border to bootstrap tab contents

of course I could replace specific arguments like this:

        mydata=c(&quot;&#225;&quot;,&quot;&#233;&quot;,&quot;&#243;&quot;)
        mydata=gsub(&quot;&#225;&quot;,&quot;a&quot;,mydata)
        mydata=gsub(&quot;&#233;&quot;,&quot;e&quot;,mydata)
        mydata=gsub(&quot;&#243;&quot;,&quot;o&quot;,mydata)
        mydata

but surely there is a easier way to do this all in onle line, right?
I dont find the gsub help to be very comprehensive on this. 

Replace multiple letters with accents with gsub

I&#39;m trying to save a list to a text file.

This is my code:

    public void button13_Click(object sender, EventArgs e)
    {
        TextWriter tw = new StreamWriter(&quot;SavedLists.txt&quot;);

        tw.WriteLine(Lists.verbList);
        tw.Close();
    }

This is what I get in the text file:

&gt;System.Collections.Generic.List`1[System.String]

Do I have to use `ConvertAll&lt;&gt;`? If so, I&#39;m not sure how to use that.

Saving lists to txt file

I'm trying to save a list to a text file.
This is my code:
<pre><code class="hljs language-typescript">public void button13_Click(object sender, EventArgs e)
{
 TextWriter tw = new StreamWriter("SavedLists.txt");

 tw.WriteLine(Lists.verbList);
 tw.Close();
}
</code></pre>
This is what I get in the text file:
>System.Collections.Generic.List`1[System.String]
Do I have to use <code>ConvertAll&#x3C;></code>? If so, I'm not sure how to use that.

`TimeZoneInfo` does not provide abbreviation or a short name for a given Timezone. The only good way to do it is to have a dictionary that will map abbreviations to either `Timezone.id`, `StandardName` or `DaylightName` properties. However, all the sources I searched for list of abbreviations have different timezone names, i.e. not the same as in Windows.

How do you show a user not a full name, id or any other name in .NET? I don&#39;t want the UtcOffset but Timezone abbreviation - PST for Pacific, UTC - for Universal, EST - for Eastern Standard and etc. Is there any C# compatible list or database with all possible timezones and their abbreviations that compatible with those that `TimeZoneInfo.GetSystemTimeZones()` gives you?

Timezone Abbreviations

I&#39;m currently working on a C# project and VisualAssist generates these fancy `/// &lt;summary&gt;&lt;/summary&gt;` comments for me and I&#39;ve been using them do document my code.

I assume there must be a way to use these comments to create HTML documentation like those done by Doxygen or Javadoc. How do I do that?

Create html documentation for C# code

AFAIK, all it knows is that at some point, its `SetResult` or `SetException` method is being called to complete the `Task&lt;T&gt;` exposed through its `Task` property.

In other words, it acts as the producer for a `Task&lt;TResult&gt;` and its completion.

I saw [**here**][1] the example:

&gt; If I need a way to execute a `Func&lt;T&gt;` asynchronously and have a `Task&lt;T&gt;`
&gt; to represent that operation.

    public static Task&lt;T&gt; RunAsync&lt;T&gt;(Func&lt;T&gt; function) 
    { 
        if (function == null) throw new ArgumentNullException(“function”); 
        var tcs = new TaskCompletionSource&lt;T&gt;(); 
        ThreadPool.QueueUserWorkItem(_ =&gt; 
        { 
            try 
            {  
                T result = function(); 
                tcs.SetResult(result);  
            } 
            catch(Exception exc) { tcs.SetException(exc); } 
        }); 
        return tcs.Task; 
    }


Which could be used if I didn’t have `Task.Factory.StartNew` - 
But I *do* have `Task.Factory.StartNew`.

**Question:**

Can someone please explain by example a scenario related **directly** to `TaskCompletionSource`
 and not to a *hypothetical* situation in which I don&#39;t have  `Task.Factory.StartNew`?

  [1]: https://devblogs.microsoft.com/pfxteam/the-nature-of-taskcompletionsourcetresult/

When should TaskCompletionSource&lt;T&gt; be used?

Setup: Entity framework code first to new database.

Scenario: I&#39;m playing around with EF and I add a bunch of elements to my database. I then change the entity model, and while I know that I could do migrations, I just want to start from scratch and basically wipe the database from the earth.

The database used by default was (localdb)\v11.0.

My question is:

Can I go somewhere and just delete a file, or start some kind of manager to delete that database and start from scratch?

LocalDB: How do you delete it?

I&#39;m using EF in my application.

I try to save\insert a new record to a mapping table

and get the following error:

`Unable to update the EntitySet &#39;UsersLimitationToCountry&#39; because it has a DefiningQuery and no &lt;InsertFunction&gt; element exists in the &lt;ModificationFunctionMapping&gt; element to support the current operation.`


Should I define it in the edmx myself? How?



because it has a DefiningQuery and no &lt;InsertFunction&gt; element exists in the &lt;ModificationFunctionMapping&gt; element

Assuming that I have a list with a huge number of items,

    l = [ 1, 4, 6, 30, 2, ... ]

I want to get the number of items from that list, where an item satisfies a certain condition. My first thought was:

    count = len([i for i in l if my_condition(l)])

But if the filtered list also has a great number of items, I think that
creating a new list for the filtered result is just a waste of memory.  For efficiency, IMHO, the above call can&#39;t be better than:

    count = 0
    for i in l:
        if my_condition(l):
            count += 1

Is there any functional-style way to get the # of items that satisfy the condition without generating a temporary list?

Get number of items from list (or other iterable) with certain condition

I want to find mean and standard deviation of 1st, 2nd,... digits of several (Z) lists. For example, I have

    A_rank=[0.8,0.4,1.2,3.7,2.6,5.8]
    B_rank=[0.1,2.8,3.7,2.6,5,3.4]
    C_Rank=[1.2,3.4,0.5,0.1,2.5,6.1]
    # etc (up to Z_rank )...

Now I want to take the mean and std of `*_Rank[0]`, the mean and std of `*_Rank[1]`, etc.  
(ie: mean and std of the 1st digit from all the (A..Z)_rank lists;  
the mean and std of the 2nd digit from all the (A..Z)_rank lists;  
the mean and std of the 3rd digit...; etc). 


Standard deviation of a list

I&#39;ve recently started using c# moving over from Java. I can&#39;t seem to find how to get a list item by index. In java to get the first item of the list it would be:

    list1.get(0);

What is the equivalent in c#?

Getting a list item by index

I have a function which reads a list of items from a file. How can I select only 50 items from the list randomly to write to another file?

    def randomizer(input, output=&#39;random.txt&#39;):
        query = open(input).read().split()
        out_file = open(output, &#39;w&#39;)
        
        random.shuffle(query)
        
        for item in query:
            out_file.write(item + &#39;\n&#39;)   

For example, if the total randomization file was
    
    random_total = [&#39;9&#39;, &#39;2&#39;, &#39;3&#39;, &#39;1&#39;, &#39;5&#39;, &#39;6&#39;, &#39;8&#39;, &#39;7&#39;, &#39;0&#39;, &#39;4&#39;]

and I would want a random set of 3, the result could be

    random = [&#39;9&#39;, &#39;2&#39;, &#39;3&#39;]

How can I select 50 from the list that I randomized?

Even better, how could I select 50 at random from the original list?

Select 50 items from list at random

I have a single list of numeric vector and I want to combine them into one vector. But I am unable to do that. This list can have one element common across the list element. Final vector should not add them twice. Here is an example:

    &gt;lst
    `1`
    [1] 1 2
    `2`
    [2] 2 4 5
    `3`
    [3] 5 9 1

I want final result as this

    &gt;result
    [1] 1 2 4 5 9 1

I tried doing following things, without worrying about the repition:

    &gt;vec&lt;-vector()
    &gt;sapply(lst, append,vec)

and

    &gt;vec&lt;-vector()
    &gt;sapply(lst, c, vec)

None of them worked. Can someone help me on this?

Thanks.

Content Type	Original Author	Original Content on Stackoverflow
Question	Jared Price	View Question on Stackoverflow
Solution 1 - C#	Eric Bole-Feysot	View Answer on Stackoverflow
Solution 2 - C#	jgallant	View Answer on Stackoverflow
Solution 3 - C#	Reacher Gilt	View Answer on Stackoverflow

Saving lists to txt file

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

Solution 3 - C#

Replace multiple letters with accents with gsub

how to give a border to bootstrap tab contents

Attributions