S3 — Use using block to get the stream

When you’re using the Ama­zon S3 client, have you come across the occa­sion­al excep­tion that says some­thing like one of these excep­tion mes­sages: “The request was abort­ed: The con­nec­tion was closed unex­pect­ed­ly” “Unable to read data from the trans­port con­nec­tion: A block­ing oper­a­tion was inter­rupt­ed by a call to WSACancel­Block­ing­Call” “Unable to read data from …

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.Net Tips — Find out if your app is running as a service

When you are devel­op­ing an appli­ca­tion to run as a ser­vice it’s nice to be able to also run it as a con­sole app so you can eas­i­ly debug, etc. On the rare occa­sion you might even want to find out if your app is run­ning in a con­sole win­dow at run­time so you can …

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.Net Tips – Use LINQ to create pairs of adjacent elements from a collection

Sup­pose you have an array of num­bers, say, [1, 3, 5, 7, 9, …], and you want to pair each ele­ment up with its neigh­bour in the array, e.g. [[1, 3], [3, 5], [5, 7], [7, 9], …]. Sure, you can iter­ate through the indices of the ele­ments and recur­sive­ly grab the ele­ment at an …

.Net Tips – Use LINQ to cre­ate pairs of adja­cent ele­ments from a col­lec­tionRead More »

.Net Tips – Make sure the runtime types match when combining delegates

In C#, it’s pos­si­ble to com­bine two del­e­gates, A and B to cre­ate a new mul­ti­cast del­e­gate, C:   When the mul­ti­cast del­e­gate is exe­cut­ed, the com­bined del­e­gates are exe­cut­ed in order as you can see from the exam­ple above. But before you can start mix and match­ing your del­e­gates like a kid in a …

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Mind the runtime optimization

You might know this already, but in C# when­ev­er you write some­thing like this: 1: if (Metho­dA() || MethodB()) 2: { 3: // do some­thing 4: } it’s not guar­an­teed that both meth­ods will be exe­cut­ed, so DO NOT DO THIS if you’re rely­ing on both meth­ods to be expect­ed to cause some desir­able side-effects. …

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Things I didn’t know about expando objects

I found out two inter­est­ing things about the ExpandoOb­ject class intro­duced in C# 4 this bank hol­i­day week­end: 1. you can spec­i­fy cus­tom events on them 2. it imple­ments the INo­ti­fyProp­er­ty­Changed inter­face Here are some quick demos to show you how to use these fea­tures: Cus­tom Events To add a cus­tom event is the same …

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Turn ExpandoObject into static type

As many oth­ers have shown, the new ExpandoOb­ject intro­duced in C# 4 can be pret­ty use­ful in some sce­nar­ios. How­ev­er, on the odd occa­sion when you want to con­vert an ExpandoOb­ject to a sta­t­ic type you have defined you can be for­giv­en for feel­ing a lit­tle lost as there are no well doc­u­ment­ed ways to …

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.Net Tips – Working with anonymous types

Anony­mous types are use­ful, espe­cial­ly in LINQ queries where you often want to iter­ate through an array of items and project them into some arbi­trar­i­ly shaped objects that are lit­tle more than sim­ple data con­tain­ers, using anony­mous types save you the has­sle of hav­ing to first declare those types which you will sim­ply throw away …

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