StreamingContext.Context Property


Gets context specified as part of the additional context.

 property System::Object ^ Context { System::Object ^ get(); };
public object Context { get; }
member this.Context : obj
Public ReadOnly Property Context As Object

Property Value

The context specified as part of the additional context.


The following example creates an instance of the StreamingContext class using the state and additional parameters. The code also shows the deserialization of an object and retrieving the value of the Context property.

using System;
using System.Text;
using System.Runtime.Serialization.Formatters.Binary;
using System.Runtime.Serialization;
using System.IO;
using System.Security.Permissions;

namespace StreamingContextExample
    class Program
        static void Main(string[] args)
            catch (System.Exception exc)
                Console.WriteLine("Press <Enter> to exit....");
        static void SerializeAndDeserialize()
            object myObject = DateTime.Now;
            // Create a StreamingContext that includes a
            // a DateTime. 
            StreamingContext sc = new StreamingContext(
                StreamingContextStates.CrossProcess, myObject);
            BinaryFormatter bf = new BinaryFormatter(null, sc);
            MemoryStream ms = new MemoryStream(new byte[2048]);
            bf.Serialize(ms, new MyClass());
            ms.Seek(0, SeekOrigin.Begin);
            MyClass f = (MyClass)bf.Deserialize(ms);
            Console.WriteLine("\t MinValue: {0} \n\t MaxValue: {1}", 
                f.MinValue , f.MaxValue);
            Console.WriteLine("StreamingContext.State: {0}", 

            DateTime myDateTime = (DateTime)sc.Context;
            Console.WriteLine("StreamingContext.Context: {0}",

    [SecurityPermission(SecurityAction.Demand, SerializationFormatter = true)]
    class MyClass : ISerializable
        private int minValue_value;
        private int maxValue_value;

        public MyClass()
            minValue_value = int.MinValue;
            maxValue_value = int.MaxValue;

        public int MinValue
            get { return minValue_value; }
            set { minValue_value = value;}

        public int MaxValue
            get { return maxValue_value; }
            set { maxValue_value = value; }

        void ISerializable.GetObjectData(SerializationInfo si, StreamingContext context)
            si.AddValue("minValue", minValue_value);
            si.AddValue("maxValue", maxValue_value);

        protected MyClass(SerializationInfo si, StreamingContext context)
            minValue_value = (int)si.GetValue("minValue", typeof(int));
            maxValue_value = (int)si.GetValue("maxValue", typeof(int));            
Imports System.Text
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Runtime.Serialization
Imports System.IO
Imports System.Security.Permissions

Class Program
    Shared Sub Main(ByVal args() As String) 
        Catch exc As System.Exception
            Console.WriteLine("Press <Enter> to exit....")
        End Try
    End Sub 
    Shared Sub SerializeAndDeserialize() 
        Dim myObject As Object = DateTime.Now
        ' Create a StreamingContext that includes a
        ' a DateTime. 
        Dim sc As New StreamingContext(StreamingContextStates.CrossProcess, myObject)
        Dim bf As New BinaryFormatter(Nothing, sc)
        Dim ms As New MemoryStream(New Byte(2047) {})
        bf.Serialize(ms, New [MyClass]())
        ms.Seek(0, SeekOrigin.Begin)
        Dim f As [MyClass] = CType(bf.Deserialize(ms), [MyClass])
        Console.WriteLine(vbTab + " MinValue: {0} " + vbLf + vbTab + " MaxValue: {1}", f.MinValue, f.MaxValue)
        Console.WriteLine("StreamingContext.State: {0}", sc.State)
        Dim myDateTime As DateTime = CType(sc.Context, DateTime)
        Console.WriteLine("StreamingContext.Context: {0}", myDateTime.ToLongTimeString())
    End Sub 
End Class 

<Serializable(), SecurityPermission(SecurityAction.Demand, SerializationFormatter := True)>  _
Class [MyClass]
    Implements ISerializable
    Private minValue_value As Integer
    Private maxValue_value As Integer
    Public Sub New() 
        minValue_value = Integer.MinValue
        maxValue_value = Integer.MaxValue    
    End Sub     
    Public Property MinValue() As Integer 
            Return minValue_value
        End Get
            minValue_value = value
        End Set
    End Property 
    Public Property MaxValue() As Integer 
            Return maxValue_value
        End Get
            maxValue_value = value
        End Set
    End Property
    Sub GetObjectData(ByVal si As SerializationInfo, ByVal context As StreamingContext)  Implements ISerializable.GetObjectData
        si.AddValue("minValue", minValue_value)
        si.AddValue("maxValue", maxValue_value)
    End Sub   
    Protected Sub New(ByVal si As SerializationInfo, ByVal context As StreamingContext) 
        minValue_value = Fix(si.GetValue("minValue", GetType(Integer)))
        maxValue_value = Fix(si.GetValue("maxValue", GetType(Integer)))
    End Sub 
End Class 


Can be null.

Applies to

See also