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there are 2 examples of code: # 1
string str1 = "hello"; string str2 = str1; //reference to the same string str1 = "bye"; //new string created and # 2
string str3 = "hello"; string str4 = (string)str3.Clone();//reference to the same string str3 = "bye";//new string created looks like they are identical aren't they? so what is the benefit to use Clone()? can you give me an example when I cannot use code#1 but code#2 ?
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Cloning in C# is useful if you want to clone an array. The Clone() method in C# is used to create a similar copy of the array. C# has the Clone method and ICloneable interface.
The only correct way to copy a String is to allocate a new block of heap memory to copy all the characters into, which is what String 's Clone implementation does. https://doc.rust-lang.org/book/second-edition/ch04-01-what-is-ownership.html covers these topics in much more detail.
clone - create something new based on something that exists. copying - copy from something that exists to something else (that also already exists).
This is useful since string implements ICloneable, so you can create a copy of clones for a collection of ICloneable items. This is boring when the collection is of strings only, but it's useful when the collection contains multiple types that implement ICloneable.
As for copying a single string it has no use, since it returns by design a reference to itself.
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Not directly in answer to your question, but in case you are looking to actually clone a string, you can use the static string.Copy() method.
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