using System.Text.RegularExpressions;//引用命名空间

string str = "a,b,c";
string[] arr = str.Split(',');

foreach (string s in arr)
{
    Console.WriteLine(s);
}

string str = "a字体b字体c字体d字体e";
string strTemp = "字体";
string[] arr = Regex.Split(str, strTemp, RegexOptions.IgnoreCase);

foreach (string s in arr)
{
    Console.WriteLine(s);
}

string str = "a,b,c@d$e";
char[] charTemp = {',', '@', '$'};
string[] arr = str.Split(charTemp);

foreach (string s in arr)
{
    Console.WriteLine(s);
}

string str = "a,b,c@d$e";
string[] arr = str.Split(new char[] { ',', '@', '$' });

foreach (string s in arr)
{
    Console.WriteLine(s);
}

string str = "a,,,b,c,d,e";
string[] arr = str.Split(',');

foreach (string s in arr)
{
    Console.WriteLine(s);
}

string str = "a,,,b,c,d,e";
string[] arr = str.Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
foreach (string s in arr)
{
    Console.WriteLine(s);
}

string str = "bacAdae";
string[] arr = Regex.Split(str, "a", RegexOptions.IgnoreCase);
foreach (string s in arr)
{
    Console.WriteLine(s);
}