C# method for checking a string

Question

Guys, someone there could give me a boost, help create this method in C#?

Method to check parentheses in a input. For example, the method should return verdadeiro for the following values:

((5+2)*2) + (40+20) + (((76-1)-3)*1)

So-and-so (the one who was at the bakery today ) looked for you.

And return Falso for the following values:

%:)

@:)

Answer 1

An ordinary solution would be:

String texto = "(()";

int parenteses = 0;
foreach (char c in texto)
{
    if (c.Equals('(')) {
        parenteses++;
    } else if (c.Equals(')')) {
        parenteses--;
    }

    if (parenteses < 0) {
        break;
    }
}

Console.WriteLine(parenteses == 0);

Testing

(() - FALSE

)( - FALSE

((1+1)*2) + (10+2) + ((((2-1)-1)*1) - TRUE

&:) - FALSE

Basically it checks if it started parentheses and makes control if it closed before, in case it closed it already interrupts the loop. It will only be correct if you closed all parentheses parenteses == 0

Ideone Demo