---
tags:
    - "Join"
    - "Merge"
    - "Append"
    - "Add"
    - "Union"
    - "Combine"
---

# Concatenate

[Combine](index.md) / **Concatenate**

<div class="grid cards" markdown>

* :green_circle: Can Read

* :red_circle: Cannot Write

</div>

## Description

A collection with the items of the first collection followed by the ones of the second

## Parameters

| Name | Description |
| :--- | :---------- |
| Collection 1 | The collection whose items come first |
| Collection 2 | The collection whose items are appended at the end |

## Code

```cs
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Pool;
using VisualScript.Icons;

namespace VisualScript.Runtime
{
    [Get]

    [Title("Concatenate")]
    [Category("Combine/Concatenate")]

    [Description("A collection with the items of the first collection followed by the ones of the second")]
    [Image(typeof(IconStack), ColorTheme.Type.Teal, typeof(BadgePlus))]

    [Parameter("Collection 1", "The collection whose items come first")]
    [Parameter("Collection 2", "The collection whose items are appended at the end")]

    [Keywords("Join", "Merge", "Append", "Add", "Union", "Combine")]

    [Serializable]
    public class TypeCollectionGameObjectsConcatenate : TypeCollectionGameObjects
    {
        // EXPOSED MEMBERS: -----------------------------------------------------------------------

        [SerializeField] private GetCollectionGameObjects m_Collection1 = new GetCollectionGameObjects();
        [SerializeField] private GetCollectionGameObjects m_Collection2 = new GetCollectionGameObjects();

        // PUBLIC METHODS: ------------------------------------------------------------------------

        public override void Get(Args args, List<GameObject> values)
        {
            values.Clear();

            List<GameObject> buffer = ListPool<GameObject>.Get();

            try
            {
                this.m_Collection1.Get(args, buffer);
                values.AddRange(buffer);

                this.m_Collection2.Get(args, buffer);
                values.AddRange(buffer);
            }
            finally
            {
                ListPool<GameObject>.Release(buffer);
            }
        }

        public override string ToString()
        {
            return $"{this.m_Collection1} + {this.m_Collection2}";
        }

        // PROTECTED METHODS: ---------------------------------------------------------------------

        protected override SubscriptionMode Subscription => SubscriptionMode.OnChange;
    }
}

```