new string []outp = Console.ReadLine().Split(new char[] ={'@',','}); code example

Example 1: how consider the first caracter in Split c#

Considerar somente a primeira string especificada para realizar o split
You can specify how many substrings to return using string.Split:

string myString = "101.a.b.c.d"

var pieces = myString.Split(new[] { '.' }, 2);
Returns:

101
a.b.c.d

Example 2: c sharp split string

// To split a string use 'Split()', you can choose where to split
string text = "Hello World!"
string[] textSplit = text.Split(" ");
// Output:
// ["Hello", "World!"]