TFS Build Service failed with HTTP code 404

When you work with VS 2012 and try to open TFS 2010 project, you could be failed with this error message :

"HTTP code 404 : Not Found", in my case clearing the cache worked.

So, what you need is :

Delete all in the folder :

C:\Users\userName\AppData\Local\Microsoft\Team Foundation\4.0\Cache

In Visual Studio 2012 templates for Microsoft Office 2013 doesn't appear

By default, the Office developer tools in Visual Studio include templates only for Microsoft Office 2010. If you want to develop solutions for Office 2013, you must download the Microsoft Office Developer Tools for Visual Studio 2012, which include project templates for Office 2013. 
Link for download

Saving page in SharePoint Designer gives JavaScript error

When you try to save document in SharePoint designer - the JavaScript error started raising.

I found that it occurred after a cumulative update SharePoint 2010 - KB2597132.

The solution to fixed it was -

1.Copying files:

FORM.JS
INIT.JS
CORE.JS
BFORM.JS
OWS.JS

from an environment where it works to : "../LAYOUTS/1033".

2.Reset the IE settings

Method not found: 'System.String System.ServiceModel.Activation.Iis7Helper.ExtendedProtectionDotlessSpnNotEnabledThrowHelper(System.Object)'.

After installing Microsoft patch MS13-04[KB 2756920](Security Update for Microsoft .NET Framework 3.5.1 on Windows 7 and Windows Server 2008 R2 - A security issue has been identified that could allow an unauthenticated remote attacker to compromise your system and gain control over it.), our SharePoint Portal was down with the error :
 WebHost failed to process a request. 
 Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/17653682 Exception: System.ServiceModel.ServiceActivationException: The service '/SecurityTokenServiceApplication/securitytoken.svc' cannot be activated due to an exception during compilation. The exception message is: Method not found: 'System.String System.ServiceModel.Activation.Iis7Helper.ExtendedProtectionDotlessSpnNotEnabledThrowHelper(System.Object)'.. ---> System.MissingMethodException: Method not found: 'System.String System.ServiceModel.Activation.Iis7Helper.ExtendedProtectionDotlessSpnNotEnabledThrowHelper(System.Object)'. at System.ServiceModel.WasHosting.MetabaseSettingsIis7V2.WebConfigurationManagerWrapper.BuildExtendedProtectionPolicy(ExtendedProtectionTokenChecking tokenChecking, ExtendedProtectionFlags flags, List`1 spnList) at System.ServiceModel.WasHosting.MetabaseSettingsIis7V2.WebConfigurationManagerWrapper.GetExtendedProtectionPolicy(ConfigurationElement element) at System.ServiceModel.WasHosting.MetabaseSettingsIis7V2.ProcessWindowsAuthentication(String siteName, String virtualPath, HostedServiceTransportSettings& transportSettings) at System.ServiceModel.WasHosting.MetabaseSettingsIis7V2.CreateTransportSettings(String relativeVirtualPath) at System.ServiceModel.Activation.MetabaseSettingsIis.GetTransportSettings(String virtualPath) at System.ServiceModel.Activation.MetabaseSettingsIis.GetAuthenticationSchemes(String virtualPath) at System.ServiceModel.Channels.HttpChannelListener.ApplyHostedContext(VirtualPathExtension virtualPathExtension, Boolean isMetadataListener) at System.ServiceModel.Channels.HttpTransportBindingElement.BuildChannelListener[TChannel](BindingContext context) at System.ServiceModel.Channels.BindingContext.BuildInnerChannelListener[TChannel]() at System.ServiceModel.Channels.MessageEncodingBindingElement.InternalBuildChannelListener[TChannel](BindingContext context) at System.ServiceModel.Channels.BinaryMessageEncodingBindingElement.BuildChannelListener[TChannel](BindingContext context) at System.ServiceModel.Channels.BindingContext.BuildInnerChannelListener[TChannel]() at System.ServiceModel.Channels.Binding.BuildChannelListener[TChannel](Uri listenUriBaseAddress, String listenUriRelativeAddress, ListenUriMode listenUriMode, BindingParameterCollection parameters) at System.ServiceModel.Description.DispatcherBuilder.MaybeCreateListener(Boolean actuallyCreate, Type[] supportedChannels, Binding binding, BindingParameterCollection parameters, Uri listenUriBaseAddress, String listenUriRelativeAddress, ListenUriMode listenUriMode, ServiceThrottle throttle, IChannelListener& result, Boolean supportContextSession) at System.ServiceModel.Description.DispatcherBuilder.BuildChannelListener(StuffPerListenUriInfo stuff, ServiceHostBase serviceHost, Uri listenUri, ListenUriMode listenUriMode, Boolean supportContextSession, IChannelListener& result) at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost) at System.ServiceModel.ServiceHostBase.InitializeRuntime() at Microsoft.IdentityModel.Protocols.WSTrust.WSTrustServiceHost.InitializeRuntime() at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) --- End of inner exception stack trace --- at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath) Process Name: w3wp 

 RESOLUTION: Uninstall KB 2756920

Get SPUser Object from SPListItem

Sometimes, you need to get SPUser object(to retrieve email, name,...) , however you have only SPListItem with SPFieldCollection. When you try to retrieve it, for example:

var field = item["user"]

you just get  a string with User ID , like : "123;#"

We need to cast this object to SPFieldUserValue.

This C# code can help us:

public SPUser GetSPUserObject(SPListItem spListItem, String fieldName)
    {
        SPUser spUser = null;
        try
        {
            if (fieldName != string.Empty)
            {
                SPFieldUser field = spListItem.Fields[fieldName] as SPFieldUser;
                if (field != null && spListItem[fieldName] != null)
                {
                    SPFieldUserValue fieldValue = field.GetFieldValue(spListItem[fieldName].ToString()) as SPFieldUserValue;
                    if (fieldValue != null)
                    {
                        spUser = fieldValue.User;
                    }
                }
            }
        }
        catch (Exception ex)
        {
            throw ex;
        }
        return spUser;
    }