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What exactly does that mean? It means that C 4.

Why is this important? The biggest reason is that it allows a C program to use dynamic dispatch to more naturally create objects coming from a dynamic language. For example, suppose you have a Calculator object declared in Cmeaning it is statically typed. You interact with your object like this:. Add 10, 20. Now suppose the Calculator is not a statically typed.

NET class or it is a. To take this a step further, if we knew that Calculator was a JavaScript class, you must use similar but still significantly different code:.

The reason for the differences in syntax is that there is no unification between the two APIs. If you look at this syntax and the earlier statically typed call, you should notice that the only difference is that in C we are declaring the data type to be dynamic. Does this mean that C is loosing it’s roots as a statically typed language or that we should all start moving towards dynamic languages?

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What is means is that it is now easier for you to sefet C code that talks to objects or APIs written in dynamically typed languages. It also means that there is a unified API to talk to any dynamic language. You algaan longer need to worry about what language you are interoperating with to determine which C code you alhan write. So how does the dynamic keyword work? As I mentioned, it’s a keyword in a similar fashion to var. You declare at compile-time the type to be dynamic, but at run-time you get a strongly typed object.

The dynamic keyword is great for writing C code that consumes a dynamic object, but alyan about going the other direction and writing C code that can be called from a dynamic language? You do this by implementing the IDynamicObject interface or more simply, inheriting from the abstract DynamicObject class and providing your own implementation for the member lookup and invocation.

Using the features and capabilities of the new dynamic keyword, the IDynamicObject interface, and the fact that the dynamic dispatch can dispatch to both dynamic and static types, C effectively gets support for duck-typing.

As an example of what I mean, suppose you have an interface IMessageRouter like this:. This is an arbitrary example, by the way. The idea isn’t specifically more suitable for message routing than anything else. I may have various implementations, written in various languages or COM which support the Sefrr method with those parameters.

Some of those implementations actually implement IMessageRouter but some don’t. I’d like to be able to do the following:.


Send “message”, ” turhal. Intellisense would work, and we’d still have some of the benefits of static typing but without the implementations having to know about your interface. Of course, it would be quite easy to create an implementation of the interface which did exactly this – but now imagine that instead of IMessageRouter we had MessageRouter – a concrete class. In this case the compiler would still restrict the caller to the public API of the class, but it wouldn’t have to be the real class.


No checking would be performed by the sdfer that your dynamic type actually supported the operations – given that we’re talking about dynamic invocation, that would be impossible to do.

It would instead be sefwr “opt-in” restriction the client places on themselves. This may all sound a bit fuzzy – I’m extremely sleepy, to be honest – but I think it’s a potentially interesting idea.

You can download the release here also see my download manager post here for a better download experience. This is an exciting release, and is jammed packed with a ton of great new features. One really nice thing about this release esfer the amount of work that the product teams put into writing walkthroughs which will guide you through most of the new features.

I believe this will be our highest-quality Community Technology Preview yet, defer we’re excited to start getting your feedback on it. In the future, we will provide a way for you to install the software on your own machine, but given where we’re at with building the product the setup experience isn’t quite ready.

The VPC image gives us a great alternative for getting the software to you as early as possible. This blog post is about the Activation aglan you will encounter with this VPC image. In most cases, you can just ignore these messages and seefr using the image. These messages are due to the way in which Windows Server and Office evaluation software works.

For obvious reasons, our release criteria for distributing VPC images requires that we only ship seder software instead of fully licensed software. In the past, Windows evaluations could be configured to expire on a precise date. Due to changes in Windows Serverwe no longer have a firm expiration date, but there are Activation reminder messages which will appear while you are running the VPC.

The good news is that these Activation messages will not cause Windows to stop working; however, you will have to dismiss some Activation messages from time to time.

Activation Toast While running this VPC image you will encounter a “toast” from time to time asking you to activate Windows. You can simply ignore this toast, or click the “X” to dismiss it. Algann continue, simply click on “Activate Later. Every time you launch Word or Excel you will be reminded of this.

After 20 uses, most Word and Excel functionality will stop working. You can still read Word and Excel documents, but you will be unable to use any of the Ribbon functionality.

This means that some of the walkthroughs dealing with Word or Excel will not work. The first 20 times you launch Word or Excel, you can simply click “Cancel” to dismiss the activation dialog. After that, if you wish to continue using Word or Excel you will need to revert to a fresh copy of this VPC image. You can download the original VPC here.

After 20 uses, the Ribbon functionality in Word and Excel will become greyed out: Project will work 25 times. After that, you can no longer use Project in this VPC image.


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It is recommended that you only launch Project if you intend to use one of the walkthroughs that require it. If you need to use Project more than 25 times you should revert to a fresh copy of this VPC image.

This is due to a hard-coded expiration date in this CTP. CTP’s are pre-release software, so they aren’t designed to run forever. If you need to continue using this VPC image after January 1,you will need to roll back the system clock in your VPC to an earlier date. In order to do so, please follow the instructions post here.

Note that you should not roll back your system clock to a date prior to your last interaction with Team Foundation Server, because otherwise Team Foundation Server will get confused. If possible, I would suggest rolling back to a clean copy of the VPC uncompress the original and immediately disabling your clock prior to launching it for the first time.

Additional Notes – No Internet Connection: This VPC image ships with Internet connections disabled. It may be tempting to want to enable an Internet connection on this VPC image in order to supply your own product key and activate this image.

However, due to security reasons we strongly advise you not to connect this VPC image to any networks intranet, Internet, etc. There are also naming conflicts which can occur if you have multiple VPC images on the same network.

Changing the computer name of this machine is not a suitable workaround, since it will break many of the walkthroughs and services. We have had reports from people who have successfully converted this image to work with Hyper-V see Grant Holliday’s blogbut this may result in additional Activation implications which differ from the scenarios documented above. In Summary These Activation messages might seem a bit “broken” at first, but by following the workarounds explained above we hope you’ll have a great experience with this VPC image.

We are excited to show you a preview of what we’re building, and we welcome your feedback! To provide us with your feedback, or get additional assistance using this VPC, please visit http: Yazan Turhal Temizer Saat Cumartesi, Mart 14, C 4.

Turhal Temizer ‘in Blogu: C#

But what does that really mean? To sum it up in one keyword: You interact with your object like this: To take this a step further, if we knew that Calculator was a JavaScript class, you must use similar but still significantly different code: ToInt32 res ; The reason for the differences in syntax is that there is no unification between the two APIs.

Add xlgan, 20 ; If you look at this syntax and the earlier statically typed call, you should notice that the only difference is that in C we are declaring the data type to be dynamic.

As an example of what I mean, suppose you have an interface IMessageRouter like this: I’d like to be able to do the following: Dealing with Activation Messages.