How Can I Update Existing Lines in a C# Windows Console Application?

Modify existing lines in C# Windows console application

When developing Windows console applications using C#, users may need to update values ​​on the same row without extending or creating a new row. For example, in a progress tracking scenario where a percentage is displayed, it would be best to incrementally update the value on the current row.

To meet this requirement, C# console applications provide a solution utilizing the "r" (carriage return character). By printing "r" to the console, the cursor will be returned to the beginning of the current line, allowing you to modify and rewrite it.

Consider the following code example:

for (int i = 0; i < 100; i++)
{
    Console.Write("\r{0}%", i);
    Thread.Sleep(100);
}

In this example, "r" ensures that the cursor returns to the beginning of the current line after each iteration. Prints the value of 'i', followed by a few spaces to overwrite any previously displayed value. It is crucial to use "Write()" instead of "WriteLine()" to avoid adding "n" (newline) characters and creating a new line.

By implementing this technique, you can efficiently update the current row in a C# Windows console application, enabling dynamic and efficient progress tracking or other scenarios where existing rows need to be updated.

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