Program to check valid parenthesis

Program to check valid parenthesis

public class Solution {
public bool IsValid(string s) {
Stack stack=new Stack();
foreach(char ch in s)
{
if(ch=='(' || ch=='{' || ch=='[')
stack.Push(ch);

if(ch==')' || ch=='}' || ch==']')
stack.Pop();
}
if(stack.Count==0)
return true;
else
return false;

}
}

 

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