C#

C# 9.0

by George Kosmidis
June 11, 2020June 11, 2020

It may be that .NET 5, the one and only .NET that will clear the confusion and lead the way for the next years was probably the biggest(?) announcement of Microsoft Build 2020, but there were numerous other equally important; from the general availability of the Blazor WebAssembly, the Azure Static Web Apps and all the projects related to IoT and Artificial Intelligence, all the way to .NET MAUI (short for Multi-platform App UI), Visual Studio Codespaces, Entity Framework Core 5, Project Tye, Azure Quantum and the multiple new features and capabilities of Azure Cosmos DB.

Although there were many more interesting things, C# 9 was left out intentionally because in this post we will deal with some of its exciting new features!

C#: Basic Combinatorics

by George Kosmidis
December 13, 2013June 16, 2020

Basic combinatorics in C# is a straight forward task for relatively small numbers like (100!). This is a helper class I wrote when I was asked to write an online lottery system.

Keep in mind though, that for bigger numbers (above 100!) you will need Arbitrary-precision arithmetic.

Here is the code and please, if someone knows a faster way or has some suggestions let me now!

Export MS SQL Database schema with C#

by George Kosmidis
November 18, 2013June 16, 2020

A few days ago, I was searching for a way to export MS SQL schema of all databases of a server for backup and migration purposes. Although I found some tools, what I needed was a way to get stored procedures, functions, views, triggers and everything even if it was encrypted.

Since I couldn’t find a way to automate this (e.g. run it every night to backup schema of my server), I thought it would be a nice weekend project.

C#: Calculating all Greek Public Holidays for any given year

by George Kosmidis
April 29, 2013June 16, 2020
1 Comment

After calculating the Greek Orthodox Easter, it was time for the public holidays calculation. With the Easter calculation ready, it proved to be much easier than expected!
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C#: Calculating Orthodox and Catholic Easter

by George Kosmidis
April 28, 2013June 16, 2020
4 Comments

Some time ago I was called about an online calendar for a company’s portal. The need was to inform employees about public holidays for the requested year. In Greece, some of those holidays are static, meaning they occur the exact same date each year, and some are based on the Orthodox Easter, so they move from date to date. There are a lot of online services that can return these information, but I thought I should give it a go and try writing the Orthodox Easter calculation offline. Saying that, I found the algorithm online, and since I was there I also found the Catholic Easter algorithm.

This is a post for the calculation of the two Christianity events, and in a later post I will also publish the public holidays calculation.

(Have in mind that since the methods return DateTime, “every possible year” is not quite accurate! And besides this, both algorithms have problems after year 4200. You can read more about it here: http://en.wikipedia.org/wiki/Computus)