Visual Studio Project 'Consider app.config remapping of assembly' error

Working with various types of projects with SharePoint, it's likely you will come across this error:

Consider app.config remapping of assembly "Microsoft.SharePoint.Security, Culture=neutral, PublicKeyToken=71e9bce111e9429c" from Version "14.0.0.0" [] to Version "15.0.0.0" [C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI\Microsoft.SharePoint.Security.dll] to solve conflict and get rid of warning.

The particular assembly might be different depending on which ones you have added or included in the project (this is common since SharePoint 2013 has to support 2010). The fix is easy - open the app.config file in your project - by default it should look like this:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
</configuration>

The fix is to map the assembly by adding the <runtime> section below:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
  <runtime>   
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
          <assemblyIdentity name="Microsoft.SharePoint.Security" publicKeyToken="71e9bce111e9429c" culture="neutral"/>
          <bindingRedirect oldVersion="14.0.0.0" newVersion="15.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
</runtime>
</configuration>

SharePoint Search and Robots.txt - telling search not to crawl parts of SharePoint 2013

Much of SharePoint's workings should A) not be accessbile (i.e. Site Settings, etc.) and B) shouldn't be crawled for content purposes. For A, there are no canned solutions but in the past, I've created a master page the redirected unauthorized users and in SharePoint 2013 there are ways to reduce for users using the Limited-access user permission lockdown mode feature:



For B, it is recommended to add Robots.txt file that will tell search to skip areas in SharePoint as follows:

1) Use Notepad (or Notepad++) to create a new text file and add the following:
User-Agent: *
Disallow: /_Layouts/
Disallow: /search/
Disallow: /searchcenter/
Disallow: /Documents/Forms/ 

WHERE:

Entry                                       What it means
User-Agent: *                           Apply to All Users
Disallow: /_Layouts/                Block _layouts
Disallow: /search/                    Block default search
Disallow: /searchcenter/          Block enterprise search center
Disallow: /Documents/Forms/  Block forms (i.e. Edit.aspx, etc.) 

Apply the proper URL here for the name of your search site (i.e. Search, SC, SearchCenter, etc.). Save this file as robots.txt.

2) Move/copy this file to the root folder of the SharePoint site (as in c:\inetpub\wwwroot\wss\virtual directories\<port #>. Right click on the file and grant "Everyone" read access. ALTERNATELY, the file can be uploaded to SharePoint's root using SharePoint designer.

3) Open Central Administration and click on Application Management > Manage Web Applications.

4) Click the Web Application to select it then in the ribbon, click Managed Paths.

5) The 'Add a new Path' text box, enter in /robots.txt, change the type to be Explicit Inclusion and click the Add Path button.

6) Open up the SharePoint Management Shell or a Command window using Run as administrator and run IISReset.

SharePoint ULS Error UserAgent not available, file operations may not be optimized

ULS Error (repeating) in SharePoint 2013 shows:

UserAgent not available, file operations may not be optimized

A quick shout out to Richard Leeman for the fix - it means that the Blob Cache has to be cleared. Using PowerShell:

$webApp = Get-SPWebApplication "http://<Site>:<Port if needed>" 
[Microsoft.SharePoint.Publishing.PublishingCache]::FlushBlobCache($webApp)

Using 'Run as administrator'

Working with Windows 2012/14, SharePoint 2013, Visual Studio 2013/14, etc. on a server, even though logged in with an Administrator account, the permissions in Windows are set so that 90% of the time, it is necesssary to right click on something and choose 'Run as administrator' to get the proper access.

This is really prevalent with SharePoint - from the Command Line to PowerShell to Central Administration, 'Run as administrator' is required.

While I got used to this, turns out the quick fix has been there all along!

The best is to adjust both Shortcuts (like Central Administration) and the actual programs themselves (like PowerShell and Visual Studio (devenv.exe)). To find the exe for a given program, right click on a shortcut and select "Properties" (if Properties is not shown, use Open file location to find the true shortcut). From the Properties window, look at the Target field - that will have the path to the executable or URL link (like CA).

Once you have the shortcut or exe, right click and select Properties - on the Properties pop-up, click the Advanced button then click the checkbox for "Run as administrator" then click OK to save the change.

NOTE: For some items, like DevEnv.exe you can only set the Administrator option on the SHORTCUT. Right click on the shortcut from the Start menu and Open file location. Once there, you can set the Administrator rights on the shortcut there.

From there on, no need to right click anymore!