c# A better way to Copy/Merge multiple arrays into one array

Question

Would anyone be able to advise if there's a better way to copy multiple arrays into a single array? The resulting array must have the elements in the same order such as arrayOne values first then arraySecond values next etc.

Following is a mockup of what I'm currently executing which working as expected. Looking for a smarter way of doing this.

// Initialise the first array.
string[] arrayOne = new string[5];
arrayOne[0] = "arrayOneValue[0]";
arrayOne[1] = "arrayOneValue[1]";
arrayOne[2] = "arrayOneValue[2]";
arrayOne[3] = "arrayOneValue[3]";
arrayOne[4] = "arrayOneValue[4]";

// Initialise the second array.
string[] arrayTwo = new string[6];
arrayTwo[0] = "arrayTwoValue[0]";
arrayTwo[1] = "arrayTwoValue[1]";
arrayTwo[2] = "arrayTwoValue[2]";
arrayTwo[3] = "arrayTwoValue[3]";
arrayTwo[4] = "arrayTwoValue[4]";
arrayTwo[5] = "arrayTwoValue[5]";

// Initialise the third array.
string[] arrayThree = new string[3];
arrayThree[0] = "arrayThreeValue[0]";
arrayThree[1] = "arrayThreeValue[1]";
arrayThree[2] = "arrayThreeValue[2]";

// string[] arrayN = new string[n]
//.
//.
//.

// Initialise the target array.
string[] finalArray = new string[arrayOne.Length + arrayTwo.Length + arrayThree.Length];
// ArrayN - string[] finalArray = new string[arrayOne.Length + arrayTwo.Length + arrayThree.Length + arrayN.Length];

// Copy/merge the three arrays into the target array.
Array.Copy(arrayOne, 0, finalArray, 0, arrayOne.Length);
Array.Copy(arrayTwo, 0, finalArray, arrayOne.Length, arrayTwo.Length);
Array.Copy(arrayThree, 0, finalArray, (arrayOne.Length + arrayTwo.Length), arrayThree.Length);
//.
//.
//.
//.
// ArrayN - Array.Copy(arrayN, 0, finalArray, (arrayOne.Length + arrayTwo.Length + arrayN), arrayN.Length) ?;

As you can see for arrayN the code can get longer. I have a maximum of 5 arrays I'm trying to copy into one array, therefore, it's manageable. I'm using this technique as part of a WebAPI where a collection of oracle parameter objects are consolidated based on business rules to be passed to several Oracle stored procedures. Any advise here is appreciated. Thanks in advance. Result

Console output 
/*--- Destination array -
arrayOneValue[0]
arrayOneValue[1]
arrayOneValue[2]
arrayOneValue[3]
arrayOneValue[4]
arrayTwoValue[0]
arrayTwoValue[1]
arrayTwoValue[2]
arrayTwoValue[3]
arrayTwoValue[4]
arrayTwoValue[5]
arrayThreeValue[0]
arrayThreeValue[1]
arrayThreeValue[2]*/

Answer 1

You can just use LINQ .Concat so that you don't need manually take care of arrays lengths and offsets:

var finalArray = arrayOne.Concat(arrayTwo).Concat(arrayThree).ToArray();

It may be little less performant than using Array.Copy, but this code is much more readable, maintainable and error-safe, which is more important.