How to Efficiently Merge Arrays in .NET?

Merging Arrays in .NET

When working with arrays in .NET, the need to combine multiple arrays into a single cohesive unit may arise. While .NET provides various mechanisms for array manipulation, it lacks a built-in function specifically tailored for merging arrays.

For .NET versions prior to 3.0, you can leverage the Array.Copy method to merge arrays. Consider the following code snippet:

int[] front = { 1, 2, 3, 4 };
int[] back = { 5, 6, 7, 8 };

int[] combined = new int[front.Length + back.Length];
Array.Copy(front, combined, front.Length);
Array.Copy(back, 0, combined, front.Length, back.Length);

In this approach, a new array combined is created with the combined length of the input arrays. The Array.Copy method is used to copy the elements from both front and back into the combined array, ensuring a seamless concatenation.

For .NET 3.0 and later, you can harness the power of LINQ's Concat method to achieve the same result with greater simplicity:

int[] front = { 1, 2, 3, 4 };
int[] back = { 5, 6, 7, 8 };
int[] combined = front.Concat(back).ToArray();

The Concat method takes two arrays as input and returns a single, combined array containing all the elements from both input arrays. It offers an elegant and concise solution for array merging.

Whether you opt for the Array.Copy approach in earlier .NET versions or the LINQ-based Concat method in later versions, these techniques provide efficient and versatile solutions for merging arrays in .NET.

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