AspNetCompatibilityRequirementsAttribute.RequirementsMode Property      
Definition
Important
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Gets or sets the level of ASP.NET compatibility required by the service.
public:
 property System::ServiceModel::Activation::AspNetCompatibilityRequirementsMode RequirementsMode { System::ServiceModel::Activation::AspNetCompatibilityRequirementsMode get(); void set(System::ServiceModel::Activation::AspNetCompatibilityRequirementsMode value); };public System.ServiceModel.Activation.AspNetCompatibilityRequirementsMode RequirementsMode { get; set; }member this.RequirementsMode : System.ServiceModel.Activation.AspNetCompatibilityRequirementsMode with get, setPublic Property RequirementsMode As AspNetCompatibilityRequirementsModeProperty Value
The AspNetCompatibilityRequirementsMode that indicates the services required degree of ASP.NET compatibility. The default value is Allowed.
Exceptions
The value is not a valid one for the AspNetCompatibilityRequirementsModeenum.
Examples
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required)]
public class CalculatorService : ICalculatorSession
{
    double result
    {   // Store result in AspNet session.
        get
        {
            if (HttpContext.Current.Session["Result"] != null)
                return (double)HttpContext.Current.Session["Result"];
            return 0.0D;
        }
        set
        {
            HttpContext.Current.Session["Result"] = value;
        }
    }
    public void Clear()
    {
    }
    public void AddTo(double n)
    {
        result += n;
    }
    public void SubtractFrom(double n)
    {
        result -= n;
    }
    public void MultiplyBy(double n)
    {
        result *= n;
    }
    public void DivideBy(double n)
    {
        result /= n;
    }
    public double Equals()
    {
        return result;
    }
}
    <AspNetCompatibilityRequirements(RequirementsMode:=AspNetCompatibilityRequirementsMode.Required)> _
    Public Class CalculatorService
        Implements ICalculatorSession
        Property Result() As Double
            ' Store result in AspNet Session.
            Get
                If (HttpContext.Current.Session("Result") Is Nothing) Then
                    Return 0D
                End If
                Return HttpContext.Current.Session("Result")
            End Get
            Set(ByVal value As Double)
                HttpContext.Current.Session("Result") = value
            End Set
        End Property
        Public Sub Clear() _
 Implements ICalculatorSession.Clear
            Result = 0D
        End Sub
        Public Sub AddTo(ByVal n As Double) _
Implements ICalculatorSession.AddTo
            Result += n
        End Sub
        Public Sub SubtractFrom(ByVal n As Double) _
Implements ICalculatorSession.SubtractFrom
            Result -= n
        End Sub
        Public Sub MultiplyBy(ByVal n As Double) _
Implements ICalculatorSession.MultiplyBy
            Result *= n
        End Sub
        Public Sub DivideBy(ByVal n As Double) _
Implements ICalculatorSession.DivideBy
            Result /= n
        End Sub
        Public Function Equal() As Double _
Implements ICalculatorSession.Equal
            Return Result
        End Function
    End Class
Remarks
Use the RequirementsMode property to set the hosting mode in code. This can also be done by setting an application-level configuration flag aspNetCompatibilityEnabled. For more information, see <serviceHostingEnvironment>.
At runtime, applications can detect whether ASP.NET compatibility mode is enabled by checking the value of the static property AspNetCompatibilityEnabled.