Parenthesis Balancing

ParenthesisBalancing.cs

// Stack Implementation

const char leftParenthesis = '(';
const char rightParenthesis = ')';
const string inputStr = "((())())()()";

public bool checkIfBalanced(){
    var items = new Stack<int>(inputStr.Length);
    
    for(int i = 0; i < inputStr.Length; i++){
        char c = inputStr[i];
        if (c == leftParenthesis){
            items.Push(i);
        }
        else if (c == rightParenthesis){
            if (items.Count == 0)
                return false;
            items.Pop();
        }
    }
    
    if (items.Count > 0)
        return false;
    return true;
}
Console.WriteLine(checkIfBalanced());