Do you have practical experience applying mathematical methods or theories?

Yes, in C# programming practice, mathematical methods and theories are often used, especially in tasks related to algorithms, data processing, graphics, and machine learning.

For example, for optimization problems, numerical analysis methods can be used; for working with graphics — linear algebra (matrices, vectors); and for signal processing — probability theory and statistics.

A simple example: calculating the arithmetic mean of an array of numbers in C#:

int[] numbers = {1, 2, 3, 4, 5};
double average = numbers.Average();
Console.WriteLine($"Average value: {average}");

This is a basic application of a mathematical operation in code.