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1.字符串：
string s1 = "test"; string s2 = "test"; string s3 = "test1".Substring(0, 4); object s4 = s3; Console.WriteLine("{0} {1} {2}", object.ReferenceEquals(s1, s2), s1 == s2, s1.Equals(s2)); Console.WriteLine("{0} {1} {2}", object.ReferenceEquals(s1, s3), s1 == s3, s1.Equals(s3)); Console.WriteLine("{0} {1} {2}", object.ReferenceEquals(s1, s4), s1 == s4, s1.Equals(s4));
运行结果：
True True True
False True True
False False True
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原文地址：http://www.cnblogs.com/xpvincent/p/4332562.html
