\u5f15\u7528\u7c7b\u578b（class）\u7684\u5b9e\u4f8b\u5b58\u50a8\u5728\u6258\u7ba1\u5806\u4e0a，\u53d8\u91cf\u4fdd\u5b58\u7684\u662f\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u6839\u636e\u5bf9\u8c61\u521b\u5efa\u540e\u5176\u72b6\u6001\u662f\u5426\u5141\u8bb8\u88ab\u4fee\u6539，\u53ef\u4ee5\u5c06\u5f15\u7528\u7c7b\u578b\u5206\u4e3a\u53ef\u53d8（Mutable）\u548c\u4e0d\u53ef\u53d8（Immutable）\u4e24\u7c7b\u3002<\/p>\n<\/p>\n
\u5b9a\u4e49：\u5bf9\u8c61\u521b\u5efa\u540e，\u5176\u5185\u90e8\u72b6\u6001（\u5b57\u6bb5\u3001\u5c5e\u6027）\u53ef\u4ee5\u88ab\u4fee\u6539\u3002
\n\u7279\u70b9：<\/p>\n
\u53ef\u4ee5\u901a\u8fc7\u516c\u5f00\u7684 setter \u6216\u65b9\u6cd5\u66f4\u6539\u5c5e\u6027\u503c\u3002<\/p>\n<\/li>\n
\u540c\u4e00\u5bf9\u8c61\u5728\u4e0d\u540c\u65f6\u95f4\u70b9\u53ef\u80fd\u5448\u73b0\u4e0d\u540c\u72b6\u6001\u3002<\/p>\n<\/li>\n
\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\u9700\u8981\u540c\u6b65\u673a\u5236\u4fdd\u8bc1\u7ebf\u7a0b\u5b89\u5168\u3002<\/p>\n<\/li>\n
\u5bb9\u6613\u4ea7\u751f\u526f\u4f5c\u7528，\u56e0\u4e3a\u591a\u4e2a\u5f15\u7528\u53ef\u80fd\u6307\u5411\u540c\u4e00\u5bf9\u8c61，\u4e00\u5904\u4fee\u6539\u4f1a\u5f71\u54cd\u6240\u6709\u5f15\u7528\u3002<\/p>\n<\/li>\n<\/ul>\n
\u793a\u4f8b：StringBuilder\u3001List<T>\u3001\u81ea\u5b9a\u4e49\u7684\u5e26\u6709 setter \u7684\u7c7b\u3002<\/p>\n<\/p>\n
\u5b9a\u4e49：\u5bf9\u8c61\u4e00\u65e6\u521b\u5efa，\u5176\u5185\u90e8\u72b6\u6001\u5c31\u5b8c\u5168\u786e\u5b9a，\u4e14\u5728\u6574\u4e2a\u751f\u547d\u5468\u671f\u5185\u4e0d\u4f1a\u53d1\u751f\u4efb\u4f55\u53d8\u5316\u3002
\n\u7279\u70b9：<\/p>\n
\u901a\u5e38\u6240\u6709\u5b57\u6bb5\u90fd\u662f\u53ea\u8bfb\u7684（readonly），\u4e14\u53ea\u80fd\u5728\u6784\u9020\u51fd\u6570\u4e2d\u521d\u59cb\u5316\u3002<\/p>\n<\/li>\n
\u4e0d\u63d0\u4f9b\u4fee\u6539\u5185\u90e8\u72b6\u6001\u7684\u65b9\u6cd5（\u65e0 setter，\u65e0\u6539\u53d8\u5b57\u6bb5\u7684\u65b9\u6cd5）\u3002<\/p>\n<\/li>\n
\u201c\u4fee\u6539\u201d\u64cd\u4f5c\u4f1a\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b，\u539f\u5b9e\u4f8b\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n<\/li>\n
\u5929\u7136\u7ebf\u7a0b\u5b89\u5168，\u53ef\u81ea\u7531\u5171\u4eab\u800c\u65e0\u9700\u540c\u6b65\u3002<\/p>\n<\/li>\n
\u4fbf\u4e8e\u7f13\u5b58\u3001\u54c8\u5e0c\u952e\u7b49\u573a\u666f（\u56e0\u4e3a\u72b6\u6001\u56fa\u5b9a，\u54c8\u5e0c\u503c\u4e0d\u53d8）\u3002<\/p>\n<\/li>\n<\/ul>\n
\u793a\u4f8b：string（\u5b57\u7b26\u4e32\u8fde\u63a5\u7b49\u64cd\u4f5c\u8fd4\u56de\u65b0\u5b57\u7b26\u4e32）\u3001System.Uri\u3001System.DateTime（\u867d\u7136\u5b83\u662f\u503c\u7c7b\u578b，\u4f46\u4e5f\u662f\u4e0d\u53ef\u53d8\u7684）\u3001\u81ea\u5b9a\u4e49\u7684\u4e0d\u53ef\u53d8\u7c7b\u3002<\/p>\n
string s1 = "Hello";
\nstring s2 = s1; \/\/ s2 \u548c s1 \u5f15\u7528\u540c\u4e00\u4e2a\u5b57\u7b26\u4e32\u5bf9\u8c61
\nConsole.WriteLine($"s1: {s1}, s2: {s2}"); \/\/ \u8f93\u51fa：Hello, Hello<\/p>\n
\/\/ \u5c1d\u8bd5\u201c\u4fee\u6539\u201ds1 \u2014\u2014 \u5b9e\u9645\u4e0a\u662f\u521b\u5efa\u4e86\u4e00\u4e2a\u65b0\u5b57\u7b26\u4e32\u5bf9\u8c61
\ns1 = s1 + " World";
\nConsole.WriteLine($"s1: {s1}, s2: {s2}");
\n\/\/ \u8f93\u51fa：s1: Hello World, s2: Hello (s2 \u4ecd\u7136\u6307\u5411\u539f\u5b57\u7b26\u4e32)<\/p>\n<\/p>\n
public class ImmutablePerson
\n{
\n public string Name { get; }
\n public int Age { get; }<\/p>\n
public ImmutablePerson(string name, int age)
\n {
\n Name = name;
\n Age = age;
\n }<\/p>\n
\/\/ \u201c\u4fee\u6539\u201d\u5e74\u9f84：\u8fd4\u56de\u4e00\u4e2a\u65b0\u5bf9\u8c61
\n public ImmutablePerson WithAge(int newAge)
\n {
\n return new ImmutablePerson(this.Name, newAge);
\n }<\/p>\n
public override string ToString() => $"{Name} ({Age})";
\n}<\/p>\n
\/\/ \u4f7f\u7528
\nvar p1 = new ImmutablePerson("Alice", 30);
\nvar p2 = p1.WithAge(31); \/\/ p1 \u4fdd\u6301\u4e0d\u53d8，p2 \u662f\u65b0\u5bf9\u8c61
\nConsole.WriteLine(p1); \/\/ Alice (30)
\nConsole.WriteLine(p2); \/\/ Alice (31)<\/p>\n<\/p>\n
StringBuilder sb1 = new StringBuilder("Hello");
\nStringBuilder sb2 = sb1; \/\/ sb2 \u548c sb1 \u5f15\u7528\u540c\u4e00\u4e2a\u5bf9\u8c61<\/p>\n
Console.WriteLine(sb1); \/\/ Hello
\nConsole.WriteLine(sb2); \/\/ Hello<\/p>\n
\/\/ \u4fee\u6539 sb1
\nsb1.Append(" World");<\/p>\n
\/\/ sb2 \u4e5f\u53d7\u5230\u5f71\u54cd，\u56e0\u4e3a\u5b83\u4eec\u6307\u5411\u540c\u4e00\u5bf9\u8c61
\nConsole.WriteLine(sb1); \/\/ Hello World
\nConsole.WriteLine(sb2); \/\/ Hello World<\/p>\n
public class MutablePerson
\n{
\n public string Name { get; set; }
\n public int Age { get; set; }<\/p>\n
public override string ToString() => $"{Name} ({Age})";
\n}<\/p>\n
\/\/ \u4f7f\u7528
\nvar p1 = new MutablePerson { Name = "Bob", Age = 25 };
\nvar p2 = p1; \/\/ p2 \u5f15\u7528\u540c\u4e00\u4e2a\u5bf9\u8c61<\/p>\n
p1.Age = 26; \/\/ \u4fee\u6539 p1
\nConsole.WriteLine(p1); \/\/ Bob (26)
\nConsole.WriteLine(p2); \/\/ Bob (26) \u2014\u2014 p2 \u4e5f\u53d8\u4e86<\/p>\n<\/p>\n
| \u72b6\u6001\u4fee\u6539<\/td>\n | \u53ef\u4ee5\u76f4\u63a5\u4fee\u6539\u5bf9\u8c61\u5185\u5bb9<\/td>\n | \u4fee\u6539\u64cd\u4f5c\u8fd4\u56de\u65b0\u5bf9\u8c61<\/td>\n<\/tr>\n |
| \u7ebf\u7a0b\u5b89\u5168<\/td>\n | \u901a\u5e38\u4e0d\u5b89\u5168，\u9700\u540c\u6b65<\/td>\n | \u5929\u7136\u5b89\u5168，\u53ef\u81ea\u7531\u5171\u4eab<\/td>\n<\/tr>\n |
| \u5185\u5b58\/\u6027\u80fd<\/td>\n | \u4fee\u6539\u539f\u5730\u8fdb\u884c，\u65e0\u9700\u989d\u5916\u5206\u914d<\/td>\n | \u6bcf\u6b21\u4fee\u6539\u53ef\u80fd\u5206\u914d\u65b0\u5bf9\u8c61<\/td>\n<\/tr>\n |
| \u9002\u7528\u573a\u666f<\/td>\n | \u9700\u8981\u9891\u7e41\u4fee\u6539\u72b6\u6001\u7684\u573a\u666f<\/td>\n | \u9700\u8981\u5171\u4eab\u3001\u7f13\u5b58\u3001\u54c8\u5e0c\u952e\u7684\u573a\u666f<\/td>\n<\/tr>\n |
| \u5e38\u89c1\u4f8b\u5b50<\/td>\n | StringBuilder,\u00a0List<T><\/td>\n | string,\u00a0System.Uri<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/p>\n","protected":false},"excerpt":{"rendered":" \u5f15\u7528\u7c7b\u578b（class）\u7684\u5b9e\u4f8b\u5b58\u50a8\u5728\u6258\u7ba1\u5806\u4e0a，\u53d8\u91cf\u4fdd\u5b58\u7684\u662f\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u6839\u636e\u5bf9\u8c61\u521b\u5efa\u540e\u5176\u72b6\u6001\u662f\u5426\u5141\u8bb8\u88ab\u4fee\u6539，\u53ef\u4ee5\u5c06\u5f15\u7528\u7c7b\u578b\u5206\u4e3a\u53ef\u53d8（Mutable）\u548c\u4e0d\u53ef\u53d8（Immutable）\u4e24\u7c7b\u30021. \u53ef\u53d8\u5f15\u7528\u7c7b\u578b\u5b9a\u4e49：\u5bf9\u8c61\u521b\u5efa\u540e，\u5176\u5185\u90e8\u72b6\u6001（\u5b57\u6bb5\u3001\u5c5e\u6027）\u53ef\u4ee5\u88ab\u4fee\u6539\u3002 |