Visual Studio – “The type or namespace name ‘DataContractJsonSerializer’ does not exist in the namespace ‘System.Runtime.Serialization.Json’ (are you missing an assembly reference?)”

The type or namespace name ‘DataContractJsonSerializer’ does not exist in the namespace ‘System.Runtime.Serialization.Json’ (are you missing an assembly reference?)

in Italian:

Il tipo o il nome dello spazio dei nomi ‘DataContractJsonSerializer’ non esiste nello spazio dei nomi ‘System.Runtime.Serialization.Json’; probabilmente manca un riferimento a un assembly

Solution:

Add the following References to your project:

System.Runtime.Serialization
System.ServiceModel.Web

In Solution Explorer, right-click on the project node and click Add Reference to select the dll files.
Remember to add using or Imports lines inside your file.

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Visual Studio – “The type or namespace name ‘DataContractAttribute’ does not exist in the namespace ‘System.Runtime.Serialization’ (are you missing an assembly reference?)”

The type or namespace name ‘DataContractAttribute’ does not exist in the namespace ‘System.Runtime.Serialization’ (are you missing an assembly reference?)

in Italian:

Il tipo o il nome dello spazio dei nomi ‘DataContractAttribute’ non esiste nello spazio dei nomi ‘System.Runtime.Serialization’; probabilmente manca un riferimento a un assembly

Solution:

Add the following References to your project:

System.Runtime.Serialization
System.ServiceModel.Web

In Solution Explorer, right-click on the project node and click Add Reference to select the dll files.
Remember to add using or Imports lines inside your file.

Did my solution solve your problem? Leave a reply.

SDK update for Windows Phone 7.8 – “The element “Deployment” in namespace “http://schemas.microsoft.com/windowsphone/2009/deployment” has invalid child element “AppExtra”. List of possible elements expected: “App”.”

The element “Deployment” in namespace “http://schemas.microsoft.com/windowsphone/2009/deployment” has invalid child element “AppExtra”. List of possible elements expected: “App”.

In Italian

L’elemento “Deployment” nello spazio dei nomi “http://schemas.microsoft.com/windowsphone/2009/deployment” ha un elemento figlio non valido “AppExtra”. Elenco di possibili elementi previsti: “App”.

Cause:
Installing the Windows Phone 8 SDK, the schema files of the previous version will update too. If you haven’t installed it and you want to work with Visual Studio 2010 you have an old version of schemas that not contains the <AppExtra> node, so the error appears because the xsd file cannot validate your WMAppManifest.xml file with the new lines

<?xml version="1.0" encoding="utf-8"?>
<Deployment xmlns="http://schemas.microsoft.com/windowsphone/2009/deployment" AppPlatformVersion="7.1">
  <AppExtra xmlns="" AppPlatformVersion="8.0">
    <Extra Name="Tiles"/>
  </AppExtra>

Solution:
Download and replace the following files inside you Visual Studio 2010 installation folder at the path like this:

C:\\Program Files\\Microsoft Visual Studio 10.0\\Xml\\Schemas

Rename the Microsoft.Phone.PreImport.targets file in

C:\\Program Files\\MSBuild\\Microsoft\\Silverlight for Phone\\v4.0

append “_” at the end of the filename: Microsoft.Phone.PreImport.targets_ (I’m searching other ways for this part of solution)

Close and re-open Visual Studio 2010 then Rebuild your solution.

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HOW TO create endpoint with Hostname or IP address in Silverlight

There are some classes in the Namespace System.Net

With Hostname use the following Class

DnsEndPoint

an example in C#

DnsEndPoint endpoint = new DnsEndPoint("https://www.myerrorsandmysolutions.com", 80);

in VB.NET

Dim endpoint As New DnsEndPoint("https://www.myerrorsandmysolutions.com", 80)

With IP address use the following Class

IPEndPoint

an example in C#

IPEndPoint endpoint = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 80);

in VB.NET

Dim endpoint As New IPEndPoint(IPAddress.Parse("127.0.0.1"), 80)

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Visual Studio – “The type or namespace name ‘Json’ does not exist in the namespace ‘System.Runtime.Serialization’ (are you missing an assembly reference?)”

The type or namespace name ‘Json’ does not exist in the namespace ‘System.Runtime.Serialization’ (are you missing an assembly reference?)

in Italian:

Il tipo o il nome dello spazio dei nomi ‘Json’ non esiste nello spazio dei nomi ‘System.Runtime.Serialization’; probabilmente manca un riferimento a un assembly

Solution:

Add the following References to your project:

System.Runtime.Serialization
System.ServiceModel.Web

In Solution Explorer, right-click on the project node and click Add Reference to select the dll files.
Remember to add using or Imports lines inside your file.

Did my solution solve your problem? Leave a reply.