Check if the Sentence Is Pangram — C# Coding Problem
Difficulty: easy | Category: string
Problem Description
A **pangram** is a sentence where every letter of the English alphabet appears at least once. Given a string `sentence` containing only lowercase English letters, return `true` if `sentence` is a pangram, or `false` otherwise.
Examples
Example 1
Input: sentence = "thequickbrownfoxjumpsoverthelazydog"
Output: true
Explanation: All 26 letters are present.
Example 2
Input: sentence = "leetcode"
Output: false