{"id":42692,"date":"2024-11-13T20:47:56","date_gmt":"2024-11-13T20:47:56","guid":{"rendered":"https:\/\/atmokpo.com\/w\/?p=42692"},"modified":"2024-11-26T06:34:44","modified_gmt":"2024-11-26T06:34:44","slug":"2-c-%ec%b5%9c%ec%8b%a0-%eb%ac%b8%eb%b2%95%ea%b3%bc-%ea%b8%b0%eb%8a%a5-%ed%99%9c%ec%9a%a9-c-9-0-%ec%9d%b4%ed%9b%84%eb%b6%80%ed%84%b0-%eb%8f%84%ec%9e%85%eb%90%9c-%ec%b5%9c%ec%8b%a0-%eb%ac%b8%eb%b2%95","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/42692\/","title":{"rendered":"[\uac1d\uccb4\uc9c0\ud5a5] 2.C# \ucd5c\uc2e0 \ubb38\ubc95\uacfc \uae30\ub2a5 \ud65c\uc6a9, C# 9.0 \uc774\ud6c4\ubd80\ud130 \ub3c4\uc785\ub41c \ucd5c\uc2e0 \ubb38\ubc95 (\uc608 \uae30\ub85d \ud0c0\uc785, init \uc811\uadfc\uc790)"},"content":{"rendered":"

<\/p>\n

C#\uc740 \uc9c0\uc18d\uc801\uc73c\ub85c \ubc1c\uc804\ud574\uc628 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\ub85c\uc11c, \ub9e4 \ubc84\uc804\ub9c8\ub2e4 \uc0c8\ub85c\uc6b4 \ubb38\ubc95\uacfc \uae30\ub2a5\ub4e4\uc774 \ucd94\uac00\ub418\uc5b4 \uac1c\ubc1c\uc790\ub4e4\uc5d0\uac8c \ub354 \ub098\uc740 \ud504\ub85c\uadf8\ub798\ubc0d \uacbd\ud5d8\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. C# 9.0\uc740 \ud2b9\ud788 \uba87 \uac00\uc9c0 \uc911\uc694\ud55c \ubb38\ubc95\uc801 \ubcc0\ud654\uc640 \uae30\ub2a5\ub4e4\uc744 \ub3c4\uc785\ud558\uc600\uace0, \uc774\ub294 \uac1c\ubc1c\uc790\ub4e4\uc774 \ucf54\ub4dc\ub97c \ub354\uc6b1 \uac04\uacb0\ud558\uace0 \uac00\ub3c5\uc131 \ub192\uac8c \uc791\uc131\ud560 \uc218 \uc788\ub3c4\ub85d \ub3c4\uc640\uc90d\ub2c8\ub2e4.<\/p>\n

1. \uae30\ub85d \ud0c0\uc785 (Record Types)<\/h2>\n

C# 9.0\uc5d0\uc11c \uac00\uc7a5 \uc8fc\ubaa9\ubc1b\ub294 \uae30\ub2a5 \uc911 \ud558\ub098\ub294 \uae30\ub85d \ud0c0\uc785<\/strong>\uc785\ub2c8\ub2e4. \uae30\ub85d \ud0c0\uc785\uc740 \ub370\uc774\ud130\ub97c \ubd88\ubcc0\uc73c\ub85c \ub2e4\ub8e8\uae30 \uc704\ud574 \uc124\uacc4\ub418\uc5c8\uc73c\uba70, \uc8fc\ub85c \ub370\uc774\ud130 \uc804\uc1a1 \uac1d\uccb4(DTO)\ub098 \ube44\uc988\ub2c8\uc2a4 \ub85c\uc9c1\uc5d0\uc11c \ub110\ub9ac \uc0ac\uc6a9\ub429\ub2c8\ub2e4. \uae30\ubcf8\uc801\uc778 \ucc28\ubcc4\uc810\uc740 \uac1d\uccb4 \uac04\uc758 \ube44\uad50\ub97c \ubcf4\ub2e4 \uc27d\uac8c \ud574 \uc900\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>\n

\uae30\ub85d \ud0c0\uc785\uc758 \uc815\uc758<\/h3>\n
public record Person(string Name, int Age);<\/code><\/pre>\n
\uc704\uc640 \uac19\uc774 \uae30\ub85d \ud0c0\uc785\uc744 \uc815\uc758\ud558\uba74, \uc790\ub3d9\uc73c\ub85c Equals<\/code>, GetHashCode<\/code>, ToString<\/code> \uba54\uc11c\ub4dc\uac00 \uc0dd\uc131\ub429\ub2c8\ub2e4.<\/p>\n
\uae30\ub85d \ud0c0\uc785\uc758 \uc0ac\uc6a9 \uc608<\/h3>\n
\nvar person1 = new Person(\"Alice\", 30);\nvar person2 = new Person(\"Alice\", 30);\nConsole.WriteLine(person1 == person2); \/\/ True\n    <\/code><\/pre>\n
\uc774 \uc608\uc81c\uc5d0\uc11c \ubcf4\ub4ef\uc774, \uac19\uc740 \uac12\uc744 \uac00\uc9c4 \ub450 \uae30\ub85d \ud0c0\uc785 \uc778\uc2a4\ud134\uc2a4\ub294 \ub3d9\uc77c\ud55c \uac83\uc73c\ub85c \uac04\uc8fc\ub429\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uae30\ub85d \ud0c0\uc785\uc740 \ubd88\ubcc0\uc131\uc744 \ubcf4\uc7a5\ud558\ubbc0\ub85c,  \uac12\uc744 \ubcc0\uacbd\ud560 \uc218 \uc5c6\uc2b5\ub2c8\ub2e4.<\/p>\n
2. init \uc811\uadfc\uc790<\/h2>\n
C# 9.0\uc740 init \uc811\uadfc\uc790<\/strong>\ub97c \ub3c4\uc785\ud558\uc5ec \uac1d\uccb4 \ucd08\uae30\ud654\uc5d0 \uad00\ud55c \uc218\uc815 \uc0ac\ud56d\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \uae30\uc874\uc758 set<\/code> \uc811\uadfc\uc790\ub294 \uac1d\uccb4\uc758 \uc0c1\ud0dc\ub97c \ubcc0\uacbd\ud560 \uc218 \uc788\uc5c8\uc9c0\ub9cc, init<\/code> \uc811\uadfc\uc790\ub294 \uac1d\uccb4 \uc0dd\uc131 \uc2dc\uc5d0\ub9cc \uc18d\uc131\uc744 \uc124\uc815\ud560 \uc218 \uc788\uac8c \ud569\ub2c8\ub2e4.<\/p>\n
init \uc811\uadfc\uc790\uc758 \uc608<\/h3>\n
public class Person\n{\n    public string Name { get; init; }\n    public int Age { get; init; }\n}\n<\/code><\/pre>\n
\uc544\ub798\uc640 \uac19\uc774 \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n
\nvar person = new Person { Name = \"Bob\", Age = 25 };\n\/\/ person.Age = 26; \/\/ \ucef4\ud30c\uc77c \uc624\ub958\n    <\/code><\/pre>\n
\uc704\uc758 \uc608\uc81c\uc5d0\uc11c Age<\/code> \uc18d\uc131\uc5d0 \ub300\ud55c \ubcc0\uacbd \uc2dc\ub3c4\ub294 \ucef4\ud30c\uc77c \uc624\ub958\ub97c \ubc1c\uc0dd\uc2dc\ud0b5\ub2c8\ub2e4. \uc774\ub294 \uac1d\uccb4 \uc9c0\ud5a5 \ud504\ub85c\uadf8\ub798\ubc0d\uc5d0\uc11c \ubd88\ubcc0 \uac1d\uccb4\uc758 \uac1c\ub150\uc744 \uc9c0\ud0a4\ub294 \ub370 \ud070 \ub3c4\uc6c0\uc774 \ub429\ub2c8\ub2e4.<\/p>\n
3. \ubc18\uae30\ub2a5 (Target-typed new expressions)<\/h2>\n
C# 9.0\uc5d0\uc11c \ucd94\uac00\ub41c \ubc18\uae30\ub2a5<\/strong>\uc744 \ud65c\uc6a9\ud558\uba74, \uac1d\uccb4\ub97c \uc0dd\uc131\ud560 \ub54c \ud0c0\uc785\uc744 \uc0dd\ub7b5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub294 \ucf54\ub4dc\uc758 \uac04\uacb0\ud568\uc744 \ub192\uc774\uba70, \uac00\ub3c5\uc131\uc744 \ud5a5\uc0c1\uc2dc\ud0b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c<\/h3>\n
List<int> list = new(); \/\/ C# 9.0\uc758 \ubc18\uae30\ub2a5 \uc0ac\uc6a9\n    <\/code><\/pre>\n
\uc704\uc640 \uac19\uc774 \uc0ac\uc6a9\ud558\uba74, \uc77c\ubc18\uc801\uc778 new List<int>()<\/code> \ub300\uc2e0 \ud0c0\uc785\uc744 \uc0dd\ub7b5\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
4. \uc0c1\uc218 (Static Abstract Members in Interfaces)<\/h2>\n
C# 9.0\uc740 \uc778\ud130\ud398\uc774\uc2a4\uc5d0 \uc815\uc801 \uba64\ubc84\ub97c \uc120\uc5b8\ud560 \uc218 \uc788\ub294 \uae30\ub2a5\uc744 \ucd94\uac00\ud558\uc600\uc2b5\ub2c8\ub2e4. \uc774 \uae30\ub2a5\uc744 \ud1b5\ud574 \uc778\ud130\ud398\uc774\uc2a4\uc5d0\uc11c \uc0c1\uc218\ub97c \uc815\uc758\ud558\uc5ec \ub2e4\uc591\ud55c \uad6c\ud604\uc5d0\uc11c \uc774\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c<\/h3>\n
public interface IShape\n{\n    static abstract double Area();\n}\n\npublic class Circle : IShape\n{\n    public static double Area() => Math.PI * radius * radius;\n}\n    <\/code><\/pre>\n
\uc774\uc640 \uac19\uc740 \ubc29\uc2dd\uc73c\ub85c \uc0c1\uc218 \ub610\ub294 \uc0c1\uc218\uc131\uc744 \uac00\uc9c4 \uba54\uc11c\ub4dc\ub97c \uc815\uc758\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
5. \uac04\ud3b8\ud55c \ud328\ud134 \ub9e4\uce6d (Enhanced Pattern Matching)<\/h2>\n
C# 9.0\uc5d0\uc11c\ub294 \ud328\ud134 \ub9e4\uce6d \uae30\ub2a5\uc774 \uac15\ud654\ub418\uc5b4 \ub354 \ub9ce\uc740 \uc870\uac74\uc744 \uba85\uc2dc\uc801\uc73c\ub85c \ud45c\ud604\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \ud2b9\ud788, is<\/code> \ud0a4\uc6cc\ub4dc\ub97c \ud65c\uc6a9\ud55c \ud328\ud134 \ub9e4\uce6d\uc5d0\uc11c \uac1c\uc120\ub41c \uae30\ub2a5\ub4e4\uc744 \ud65c\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uc608\uc81c<\/h3>\n
\nif (obj is int number)\n{\n    Console.WriteLine($\"The number is: {number}\");\n}\n    <\/code><\/pre>\n
\uc704 \uc608\uc81c\ub294 \uac1d\uccb4\uac00 int<\/code> \ud0c0\uc785\uc778 \uacbd\uc6b0\uc5d0\ub9cc \uc870\uac74\uc774 \ub9cc\uc871\ud558\uba70, \ub9cc\uc871\ud560 \uacbd\uc6b0 \ud574\ub2f9 \uac12\uc744 number<\/code>\ub85c \uc0ac\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n
\uacb0\ub860<\/h2>\n
C# 9.0 \uc774\ud6c4\ub85c \ub3c4\uc785\ub41c \uc774\ub7ec\ud55c \ub2e4\uc591\ud55c \ubb38\ubc95\uacfc \uae30\ub2a5\ub4e4\uc740 \uac1c\ubc1c\uc790\ub4e4\uc774 \ub354 \uc548\uc804\ud558\uace0 \ud6a8\uc728\uc801\uc778 \ucf54\ub4dc\ub97c \uc791\uc131\ud560 \uc218 \uc788\ub3c4\ub85d \ub3d5\uc2b5\ub2c8\ub2e4. \uae30\ub85d \ud0c0\uc785\uacfc init \uc811\uadfc\uc790, \ubc18\uae30\ub2a5, \uadf8\ub9ac\uace0 \uac15\ud654\ub41c \ud328\ud134 \ub9e4\uce6d \ub4f1\uc740 \ud2b9\ud788 \ub192\uc740 \uac00\ub3c5\uc131\uacfc \uc720\uc9c0\ubcf4\uc218\uc131\uc744 \uc81c\uacf5\ud558\ubbc0\ub85c, \uc801\uadf9\uc801\uc73c\ub85c \ud65c\uc6a9\ud558\ub294 \uac83\uc774 \uc88b\uc2b5\ub2c8\ub2e4. \uc55e\uc73c\ub85c\uc758 C#\uc5d0\uc11c \uc5b4\ub5a4 \ud601\uc2e0\uc774 \uc788\uc744\uc9c0 \uae30\ub300\uac00 \ub429\ub2c8\ub2e4!<\/p>\n
<\/body><\/p>\n","protected":false},"excerpt":{"rendered":"
C#\uc740 \uc9c0\uc18d\uc801\uc73c\ub85c \ubc1c\uc804\ud574\uc628 \ud504\ub85c\uadf8\ub798\ubc0d \uc5b8\uc5b4\ub85c\uc11c, \ub9e4 \ubc84\uc804\ub9c8\ub2e4 \uc0c8\ub85c\uc6b4 \ubb38\ubc95\uacfc \uae30\ub2a5\ub4e4\uc774 \ucd94\uac00\ub418\uc5b4 \uac1c\ubc1c\uc790\ub4e4\uc5d0\uac8c \ub354 \ub098\uc740 \ud504\ub85c\uadf8\ub798\ubc0d \uacbd\ud5d8\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. 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