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RemotingServices.IsOneWay Method

Returns a Boolean value that indicates whether the client that called the method specified in the given message is waiting for the server to finish processing the method before continuing execution.

Namespace:  System.Runtime.Remoting
Assembly:  mscorlib (in mscorlib.dll)

public static bool IsOneWay(
	MethodBase method


Type: System.Reflection.MethodBase

The method in question.

Return Value

Type: System.Boolean
true if the method is one way; otherwise, false.


The immediate caller does not have infrastructure permission.

When a one-way method is called, the client does not wait for the server to finish processing the message. The client method returns to the application with no knowledge of whether or not the server will successfully process the message. Methods are marked as one way using the OneWayAttribute.

One-way methods cannot have a return value or any out parameters.

public class HelloServer : MarshalByRefObject {

   public HelloServer() {
      Console.WriteLine("HelloServer activated.");

   public void SayHelloToServer(string name) {
      Console.WriteLine("Client invoked SayHelloToServer(\"{0}\").", name);

   // IsOneWay 
   // Note the lack of the OneWayAttribute adornment on this method. 
   public string SayHelloToServerAndWait(string name) {
      Console.WriteLine("Client invoked SayHelloToServerAndWait(\"{0}\").", name);

         "Client waiting for return? {0}",
         RemotingServices.IsOneWay(MethodBase.GetCurrentMethod()) ? "No" : "Yes"

      return "Hi there, " + name + ".";

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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