Tag Archives: cryptography

Generate a random password in C#

As I mentioned in a recent post, you should always use a strong password for every login. Remember, a computer can perform millions or billions of operations per second, so your daughter’s birthday or the name of your son’s guinea … Continue reading

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Make the user enter a password to use a program in C#

The example Display a simple password dialog before a program starts in C# displays a simple password form. It compares the value entered by the user with a string inside the program to decide whether the user entered the right … Continue reading

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Find duplicate files in C#, Part 4 of 4

The last three posts described an application that searches for duplicate files and removes them. The program seems to work fairly well, at least for small test directories. When I tried it on a directory containing around 8,000 files, however, … Continue reading

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Find duplicate files in C#, Part 3 of 4

The last two posts described an application that searches for duplicate files and removes them. This post explains how the program removes the files when you click the Delete Selected button. When you click the button, the following code executes. … Continue reading

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Find duplicate files in C#, Part 2 of 4

The previous post Find duplicate files in C#, Part 1 of 4 explained how the example uses a LINQ query to select files grouped by hash code. This post explains how the program displays the files’ contents and how the … Continue reading

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Find duplicate files in C#, Part 1 of 4

This example lets you find and remove duplicate files. It’s fairly complex, so I’m going to cover it’s more interesting pieces in several posts. I won’t cover some of the less interesting pieces at all. Enter a directory path or … Continue reading

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Calculate hash codes for a file in C#

Hash codes are codes that concisely represent files or other chunks of data. The basic idea is to combine the data’s bytes in ways so that two different files are likely to have different hash codes. If you save a … Continue reading

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Book Errata Page: The C# Helper Top 100

This is the errata page for my book The C# Helper Top 100, The 100 most popular posts at csharphelper.com. If you find mistakes, please post them here in the Leave a Reply box at the bottom of the page. … Continue reading

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Book Discussion Page: The C# Helper Top 100

This is a discussion page for my book The C# Helper Top 100, The 100 most popular posts at csharphelper.com. Please post questions, thoughts, and suggestions here in the “Leave a Reply” box at the bottom of the page. I … Continue reading

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Table of Contents: The C# Helper Top 100

This is a brief summary of the book’s table of contents. Introduction Part I. Serialization 1. Read a CSV File into an Array (1) 2. Use JSON to Serialize and Deserialize Objects (49) Part II. Graphing 3. Draw a Graph … Continue reading

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