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https://stackoverflow.com/questions/333829/why-cant-i-define-a-default-constructor-for-a-struct-in-net
If you declare two fields as above without instantiating either, then break the debugger, m will be null but m2 will not. Given this, a parameterless constructor would make no sense, in fact all any constructor on a struct does is assign values, the thing itself already exists just by declaring it.
https://github.com/dotnet/corefx/issues/38569
Jun 15, 2019 · Constructor parameters, properties and Deconstruct method parameters might not match up, possibly leading to confusing situations where deserializing a previously serialized object does not work. Immutable structs always still have a default parameterless constructor.
https://studentboxoffice.in/dotnet/interview-objective-questions/79/270
Structs do not support inheritance but it can implement interfaces. Structs cannot contain explicit parameterless constructors.
https://www.codeproject.com/questions/337658/why-structures-can-not-have-parameter-less-constru
But does it make sense for parameterless struct constructors? No, because the syntax does not allow such constructors anyway. Here is the example of circular "proof". The speculation goes: parameterless constructors are not allowed by the syntax, because if they were allowed, their call would not …
https://www.splessons.com/lesson/csharp-structs/
In C#, structs are nothing but Structure.Structs may seem similar to classes but there are differences in both. Structs are value types variable which hold data of other types that can contain constructors, constants, fields, methods, properties, indexers, operators, events, and nested types.
https://social.msdn.microsoft.com/forums/en-US/d67cc2f9-d310-4f68-be44-3d25b67545c3/why-structs-cant-have-explicit-parameterless-constructors
Jan 10, 2009 · Rudedog talks about the implementation, but the fundamental reason why structs don't have user-definable parameterless constructors is that the CLR does not want to be obliged to call them, namely during array construction. When you define an array of structs, every array element must contain a fully initialized struct instance.
https://www.c-sharpcorner.com/UploadFile/0e8478/parameterless-constructors-in-structs/
In the older versions of C# the structures or struct types were unable to support parameterless constructors explicitly. That was the most common drawback in the programming era but the reason for that was the syntax new sa() in C# had been used for many years. Now it is possible to define parameterless constructors for structs in the IL.
https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/structs
A struct cannot declare a parameterless constructor (a constructor without parameters) or a finalizer. Structs are copied on assignment. When a struct is assigned to a new variable, all the data is copied, and any modification to the new copy does not change the data for the original copy.
https://forums.asp.net/t/2102931.aspx?Struct+and+Default+Constructor
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