c#数组索引超出范围，但索引为零

public int Laenge = 10;
public int Breite = 10;   
public Vector3[] new_Ver = new Vector3[300];
public Vector3[,] new_Ver_s = new Vector3[11,11];
public Vector2[] new_UV = new Vector2[300];
public Vector2[,] new_UV_s = new Vector2[11,11];

void Start () {
int n=0;
for(int l=0;l<=Laenge;l++)
    {
        for(int b=0;b<=Breite;b++)
        {
            if(b>1 || l<Laenge)
            {
                if(b%2 ==1)
                {
                    Debug.Log(l);Debug.Log(b);Debug.Log(n+"f");
                    new_Ver[n]=new_Ver_s[l,b]; //this is the line where it says theres a bug.
                    new_UV[n]=new_UV_s[l,b];
                    n++;
                }     
            }
        }   
    }

上面写着:

IndexOutOfRangeException: Array index out of range

但是调试说所有索引都是零。是因为元素是空的吗?我怎么能把东西放进去呢?如果我对二维数组做同样的事情，没有问题。我尝试了一些东西，并用一个空的vector3变量替换了new_Uv_s。还是同样的错误