How can I get sub-string from one specific character to another one?
For example if I have this format:
string someString = \"1.7,2015-05-21T09:18:58;\";
If you string has always one , and one ; (and ; after your ,), you can use combination of IndexOf and Substring like;
string someString = "1.7,2015-05-21T09:18:58;";
int index1 = someString.IndexOf(',');
int index2 = someString.IndexOf(';');
someString = someString.Substring(index1 + 1, index2 - index1 - 1);
Console.WriteLine(someString); // 2015-05-21T09:18:58
Here a demonstration.