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Thursday, October 15, 2009 5:00 AM

Transfer Modes and Buffer Sizes

Why do only some of the bindings allow setting a MaxBufferSize? The maximum buffer size and the maximum received message size are in many ways linked together. If the message is being transferred in a single buffer, then it only makes sense for the largest
Posted by Nicholas Allen | 0 Comments
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Wednesday, July 29, 2009 5:00 AM

Missing Binding Extensions

Why do I get an error “configuration evaluation context not found” when I try to create a custom binding using bindings or binding elements from a library? The evaluation context not found error (or in traces with the identifier System.ServiceModel.EvaluationContextNotFound)
Posted by Nicholas Allen | 0 Comments
Tuesday, July 21, 2009 5:00 AM

Top Down Binding Element Order

Why does a message encoder have to be specified before the transport when constructing a binding? A message encoder doesn’t directly fit into a channel stack because the message encoder type doesn’t implement any of the channel shapes. Instead, a message
Posted by Nicholas Allen | 0 Comments
Wednesday, July 15, 2009 5:00 AM

Load Balanced Web Service Bindings

What options can I use with WSHttpBinding to make it friendlier to load balancing? The primary difficulty encountered when using WSHttp with a load balancer is that WSHttp is easy to configure to produce application-level sessions between the client and
Posted by Nicholas Allen | 0 Comments
Wednesday, July 01, 2009 5:00 AM

Binary Http Binding

Do I need IIS7 to use binary with HTTP for WCF? No, all you need is a custom binding because we don’t include a standard binding with that configuration out of the box. Here’s a quick example of putting binary and HTTP together with either code or configuration:
Posted by Nicholas Allen | 3 Comments
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Friday, April 17, 2009 5:00 AM

Default Message Encodings

What message encoding do I get if I don't include one in the binding? A message encoding binding element is required for any binding that uses an encoding-aware transport. However, it turns out that most transport binding elements include a default message
Posted by Nicholas Allen | 0 Comments
Friday, December 05, 2008 5:00 AM

Non-Destructive Queue Receive

You should take the time to understand the earlier articles in the series for context if you haven't already. Future of Queuing An Alternative Queuing Model The three basic operations that we talked about for queuing with non-destructive receives are
Posted by Nicholas Allen | 0 Comments
Thursday, May 29, 2008 5:00 AM

Building with Encoders

The basis of a channel stack is that there is a series of objects that share a common interface for communication. This leaves message encoders with something of a problem as the primitive operations for encoding and decoding messages are different than
Posted by Nicholas Allen | 2 Comments
Monday, April 21, 2008 5:00 AM

Context Channel Shapes

What channels can be used in a context binding? The primary limitation for building a context binding is that the channel stack has to have the right shape. The context exchange protocol used by a context binding requires that the first invoked operation
Posted by Nicholas Allen | 1 Comments
Thursday, April 17, 2008 5:00 AM

Why Dual is Reliable

You may have noticed that bindings use two different classes for configuring reliability: ReliableSession and OptionalReliableSession. The only difference between the two is that OptionalReliableSession has an Enabled property that allows the reliable
Posted by Nicholas Allen | 1 Comments
Tuesday, April 08, 2008 5:00 AM

Default ProtectionLevel for Standard Bindings

Previously I've described how messages are protected by using the ProtectionLevel attribute to specify the minimum level of protection. If you don't specify a protection level explicitly, then you'll get one by default that is computed based on the binding.
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Friday, March 28, 2008 5:00 AM

Overriding Protection for IPSec

How do I use username credentials with IPSec? I'm told that I need to turn on security but my connection is already secure. WCF only permits username tokens to be transmitted over a binding that's secure. If a username and password are transmitted without
Posted by Nicholas Allen | 2 Comments
Thursday, March 13, 2008 5:00 AM

Partial Trust Binding Black List

Partial trust support in WCF is an Orcas feature that allows clients and services to be run in an environment with restricted permissions. WCF is part of a fully trusted installation, so by default partially trusted callers are not allowed to call into
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Monday, December 31, 2007 5:00 AM

Mapping Credentials to Authentication Schemes

You may have noticed that an HTTP binding is configured with an HttpClientCredentialType whereas an HTTP binding element is configured with an AuthenticationScheme. How are these two settings related? If you want to switch between a custom binding and
Posted by Nicholas Allen | 3 Comments
Monday, December 10, 2007 5:00 AM

Deriving from Bindings

When packaging up a collection of settings, how do I know whether to use a CustomBinding, extend the Binding class, or extend one of the standard binding classes? In most cases this should be easily decidable by asking at most two questions. The first
Posted by Nicholas Allen | 1 Comments
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