Compiler gives error when struct is not initialized and if we try to access the property but not with variable [duplicate]

Answer 1

A few code samples might help clarify this better:

// This works because you assign both fields before accessing anything
EmpStruct empStruct;
empStruct.SecondNumber = 2;
empStruct.firstNumber = 1; // I made this public
empStruct.FirstNumber = 3;
Console.WriteLine(empStruct.FirstNumber);
Console.WriteLine(empStruct.SecondNumber);

// This fails because you can't use properties before assigning all the variables
EmpStruct empStruct;
empStruct.SecondNumber = 2;
empStruct.FirstNumber = 3;

// This works because you are only accessing a field that the compiler knows you've assigned
EmpStruct empStruct;
empStruct.SecondNumber = 2;
Console.WriteLine(empStruct.SecondNumber);

// This fails because you haven't assigned the field before it gets accessed.
EmpStruct empStruct;
Console.WriteLine(empStruct.SecondNumber);

The point is, the compiler knows exactly what will happen when you assign a field. But when you assign a property, that might access any number of other fields on the struct. The compiler doesn't know for sure. So it requires you to have all the fields assigned before you can access a property.