C# 判断某值在数组中的索引

string[] CharArray = {
"A",
"B",
"C"
};
int Pointer = Array.IndexOf(CharArray, "A");
//Pointer=-1不存在，否则为索引

string[] CharArray = {
"A",
"B",
"C"
};
bool Pointer = ((IList )strArr).Contains("A");
//true 存在,flase 不存在

ArrayList CharList = new ArrayList();
CharList.Add("A");
CharList.Add("B");
CharList.Add("C");
CharList.Add("D");

int Pointer = CharList.IndexOf("A");
//Pointer=-1不存在，否则为索引