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JavaScriptSerializer Constructor (JavaScriptTypeResolver)

Initializes a new instance of the JavaScriptSerializer class that has a custom type resolver.

Namespace:  System.Web.Script.Serialization
Assembly:  System.Web.Extensions (in System.Web.Extensions.dll)

public JavaScriptSerializer(
	JavaScriptTypeResolver resolver


Type: System.Web.Script.Serialization.JavaScriptTypeResolver
The custom type-resolver object.

When it is serializing an object, the JavaScriptSerializer class uses the resolver parameter to determine the appropriate value to include in the serialized JSON string for the type metadata property ("__type"). Similarly, when the JavaScriptSerializer class is deserializing a JSON string, it resolves the type metadata property value to the appropriate managed type by using the resolver instance.

You can set the resolver parameter to null, which is equivalent to calling the JavaScriptSerializer constructor.

The instance of JavaScriptSerializer that is used by the asynchronous communication layer for invoking Web services from client script uses a special type resolver. This type resolver restricts the types that can be deserialized to those defined in the Web service’s method signature, or the ones that have the GenerateScriptTypeAttribute applied. You cannot modify this built-in type resolver programmatically.

.NET Framework

Supported in: 4, 3.5 SP1
Obsolete (compiler warning) in 3.5

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.