string str1 = "hello"; string str2 = "world"; int result = string.Compare(str1, str2, true); // result = -1 because "hello" is less than "world" in the lexicographic order int num1 = 5; int num2 = 3; result = num1.CompareTo(num2); // result = 1 because 5 is greater than 3Package/library: System Describe briefly: These methods are used for comparisons, whether it be comparing strings, numbers, or other objects. They are included in the `System` namespace, which provides fundamental types and base classes that define commonly-used value and reference data types, events and event handlers, interfaces, attributes, and processing exceptions. Try determine package/library: - `Newtonsoft.Json.JsonConvert.SerializeObject(object value)` converts an object to its JSON representation. - `System.Security.Cryptography.HMACSHA256.ComputeHash(byte buffer)` computes the hash of the input data using the HMAC-SHA256 algorithm. Package/library: Newtonsoft.Json (for JsonConvert.SerializeObject) and System.Security.Cryptography (for HMACSHA256.ComputeHash) Describe briefly: These methods are used for data serialization (converting objects to JSON) and data security (creating a hash using the HMAC-SHA256 algorithm). The `JsonConvert` class is part of the Newtonsoft.Json library, which provides flexible JSON serialization capabilities for .NET applications. The `HMACSHA256` class is part of the System.Security.Cryptography namespace, which provides cryptographic functionality to secure data.