How can I get the first character of a string?

Question

for example, i have some string

var a = '2,,2,';
var b = ',,,'

how to get only first character,

so i will get

a = '2'
b = ','

Answer 1

string s = "abcdefg";
string sB = s[0];

sB = "a"

Answer 2

 string a= "abc";
 string subString = a.Substring(0,1);

Answer 3

Characters in Strings can be accessed in the same way as arrays.

So for example, to get the first character in a string variable name you use the expression name[0]

Answer 4

Use the index of the character you want, so: a[0]

For a complete answer:

char getFirstChar(string inString, char defaultChar)
{
    if (string.IsNullOrEmpty(inString)) return defaultChar;
    return inString[0];
}