Replace a string in text file with a 2D array

Question

Dear friends,

I have 2D array of doubles in C# and also I have a text file including many texts.

Somewhere in the text file I have a text called"[$CHANGE]". I would like to replace ["$CHANGE"] with the content of the 2D array with the same number of columns and rows.

How can I do this in a short way?

 

For example.

 

1. My original text file C:/MyText.txt:

HELLO TO EVERY ONE

[$CHANGE"] 

NOW GOODBYE 

 

2. My Array:

1 2 3

1.1 2.1 3.1

5.1 5.2 5.3

 

3. My text file after replacing the array:

HELLO TO EVERY ONE

1 2 3

1.1 2.1 3.1

5.1 5.2 5.3

NOW GOODBYE