垃圾收集如何决定变量的生成

我知道GC有3(0,1,2)代,但我想知道GC如何决定变量的生成?

我认为所有变量都会进入第0代,过一段时间后会转移到第1代和第2代。GC决定这一代的大小是否重要?

方案1:

private static void Main(string[] args)
{
        int a = 0;
        string name = "Test";
        var byteArray = new byte[10];
        byteArray[4] = 4;

        Console.WriteLine($"Generation of array {GC.GetGeneration(byteArray)}");
        Console.WriteLine($"Generation of local int variable {GC.GetGeneration(a)}");
        Console.WriteLine($"Generation of local string variable {GC.GetGeneration(name)}");
}

后果

Generation of array 0
Generation of local int variable 0
Generation of local string variable 0

方案2:

private static void Main(string[] args)
{
        int a = 0;
        string name = "Test";
        var byteArray = new byte[100000000];
        byteArray[4] = 4;

        Console.WriteLine($"Generation of array {GC.GetGeneration(byteArray)}");
        Console.WriteLine($"Generation of local int variable {GC.GetGeneration(a)}");
        Console.WriteLine($"Generation of local string variable {GC.GetGeneration(name)}");

}

后果

Generation of array 2
Generation of local int variable 0
Generation of local string variable 0