Console.Write("Enter a character: "); char ch = (char)Console.Read(); if (Char.IsUpper(ch)) { Console.WriteLine("The character is an uppercase letter."); } else if (Char.IsLower(ch)) { Console.WriteLine("The character is a lowercase letter."); } else if (Char.IsDigit(ch)) { Console.WriteLine("The character is a number."); } else { Console.WriteLine("The character is not alphanumeric."); } //Sample Input and Output: //Enter a character: E //The character is an uppercase letter. //Enter a character: e //The character is a lowercase letter. //Enter a character: 4 //The character is a number. //Enter a character: = //The character is not alphanumeric.