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Sequence contains more than one element
... which (I assume) should be unique, therefore, SingleOrDefault is actually more appropriate than FirstOrDefault. Also, this has actually raised a more serious problem with the OP's database design as it shows that it is possible to add 2 customers with the same ID!
– James
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Merge two (or more) lists into one, in C# .NET
Is it possible to convert two or more lists into one single list, in .NET using C#?
13 Answers
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Why is x86 ugly? Why is it considered inferior when compared to others? [closed]
...itectural registers, which can force programs to round-trip through memory more frequently than would otherwise be necessary. The extra instructions needed to do this take execution resources that could be spent on useful work, although efficient store-forwarding keeps the latency low. Modern impl...
Why do you not use C for your web apps?
...need to have really good people writing your programs. That means you pay more.
Also, C doesn't have the benefit of drawing from an enormous single standard library of functionality as .NET (and the other major web-centric platforms) has. So you may have to either buy components, or perform int...
Biggest advantage to using ASP.Net MVC vs web forms
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Link to the source of this answer with more details: weblogs.asp.net/shijuvarghese/archive/2008/07/09/…
– DK.
Oct 25 '11 at 18:17
add a c...
Strengths of Shell Scripting compared to Python [closed]
...ow not sure whether I should invest my time in learning shell scripting anymore. So I want to ask:
8 Answers
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Differences between Perl and PHP [closed]
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Perl and PHP are more different than alike. Let's consider Perl 5, since Perl 6 is still under development. Some differences, grouped roughly by subject:
Perl has native regular expression support, including regexp literals. PHP uses Perl's...
Difference between scaling horizontally and vertically for databases [closed]
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Horizontal scaling means that you scale by adding more machines into your pool of resources whereas Vertical scaling means that you scale by adding more power (CPU, RAM) to an existing machine.
An easy way to remember this is to think of a machine on a server rack, we add mo...
Is there more to an interface than having the correct methods
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Interfaces are a way to make your code more flexible. What you do is this:
Ibox myBox=new Rectangle();
Then, later, if you decide you want to use a different kind of box (maybe there's another library, with a better kind of box), you switch your code to:
Ibox ...
Is there a way to specify how many characters of a string to print out using printf()?
...c way is:
printf ("Here are the first 8 chars: %.8s\n", "A string that is more than 8 chars");
The other, often more useful, way is:
printf ("Here are the first %d chars: %.*s\n", 8, 8, "A string that is more than 8 chars");
Here, you specify the length as an int argument to printf(), which tr...