parenthesisBalancing.cs

public class ParenthesisBalancing
{
    public bool checkIfParanthesisIsBalanced(string str)
    {
        return !string.IsNullOrEmpty(str) ? check(str) : false;
    }

    private bool check(string str)
    {
        var s = new Stack();
        for (int i = 0; i < str.Length; i++)
        {
            if (str[i] == '{' || str[i] == '(' || str[i] == '[')
            {
                s.push(str[i]);
            } 
            else if (str[i] == '}' || str[i] == ')' || str[i] == ']')
            {
                if (s.count == 0 || s.peek() != str[i])
                {
                    return false;
                }
                s.pop();
            }
        }

        return s.count == 0 ? true : false;
    }
}