Unity Environment Swicher

ChangeEnvironment.cs

using UnityEngine;
using UnityEditor;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class ChangeEnvironment {

    [MenuItem("Environment/Develop")]
    static void Develop(){
        var symbols = GetSymbols();
        symbols.Add("DEVELOP");
        symbols.Remove("RELEASE");
        SetSymbols(symbols);
    }

    [MenuItem("Environment/Release")]
    static void Release(){
        var symbols = GetSymbols();
        symbols.Add("RELEASE");
        symbols.Remove("DEVELOP");
        SetSymbols(symbols);
    }

    static List<string> GetSymbols(){
        return PlayerSettings.GetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup).Split(';').ToList();
    }

    static void SetSymbols(List<string> symbols){
        var symbolStr = string.Empty;
        symbols.ForEach(s => symbolStr += s + ";");
        PlayerSettings.SetScriptingDefineSymbolsForGroup(EditorUserBuildSettings.selectedBuildTargetGroup, symbolStr);
    }
}

System.String.Join