TextBox text and xor filter

Question

my problem today in C#. I make xor crypt for my text lines, and want make for it generator, but my TextBox with source text return diffential string and result is not true.

Xor function:

private string GetText(byte[] Text)
{
    byte[] Key = { 0x12, 0x05, 0x52 };
    // ----
    for (int i = 0; i < Text.Length; i++)
    {
        Text[i] ^= Key[i % 3];
    }
    // ----
    return Encoding.ASCII.GetString(Text);
}

True result:

string Text = ".\\MyExample.txt";
textBox2.Text = GetText(Encoding.ASCII.GetBytes(Text)); //Result: <Yk@*sh"~`|f}&

False result:

string Text = textBox1.Text; //Text: ".\\MyExample.txt"
textBox2.Text = GetText(Encoding.ASCII.GetBytes(Text)); //Result: <Y_|jd?bi7<q*f

Why i get different results and how it fix?

Answer 1

Your code contains an escaped backslash. C# is converting \\ to a single \:

string Text = ".\\MyExample.txt";  // Text == ".\MyExample.txt"

If you want Text to contain \\, use one of the following methods:

string Text = @".\\MyExample.txt";
string Text = ".\\\\MyExample.txt";

Answer 2

The text you are defining in the first sample is not the same as the text coming from the TextBox.

string Text = ".\\MyExample.txt";
string TextBoxText = textBox1.Text; // is actually ".\\\\MyExample.txt"

The \ is an escape character, thus if you were to display ".\\MyExample.txt" in your TextBox, you would see .\MyExample.txt.