They must have a value at compilation-time (you can have e.g. 3.14 * 2, but cannot call methods)
Could be declared within functions
Are copied into every assembly that uses them (every assembly gets a local copy of values)
Can be used in attributes
Readonly instance fields
Must have set value, by the time constructor exits
Are evaluated when instance is created
Static readonly fields
Are evaluated when code execution hits class reference (when new instance is created or a static method is executed)
Must have an evaluated value by the time the static constructor is done
It's not recommended to put ThreadStaticAttribute on these (static constructors will be executed in one thread only and will set the value for its thread; all other threads will have this value uninitialized)
Constants
Constants are static by default
They must have a value at compilation-time (you can have e.g. 3.14 * 2, but cannot call methods)
Could be declared within functions
Are copied into every assembly that uses them (every assembly gets a local copy of values)
Can be used in attributes
Readonly instance fields
Must have set value by the time constructor exits
Are evaluated when instance is created
Static readonly fields
Are evaluated when code execution hits class reference (when new instance is created or a static method is executed)
Must have an evaluated value by the time the static constructor is done
It's not recommended to put ThreadStaticAttribute on these (static constructors will be executed in one thread only and will set the value for its thread; all other threads will have this value uninitialized)
Constants
Constants are static by default
They must have a value at compilation-time (you can have e.g. 3.14 * 2, but cannot call methods)
Could be declared within functions
Are copied into every assembly that uses them (every assembly gets a local copy of values)
Can be used in attributes
Readonly instance fields
Must have set value, by the time constructor exits
Are evaluated when instance is created
Static readonly fields
Are evaluated when code execution hits class reference (when new instance is created or a static method is executed)
Must have an evaluated value by the time the static constructor is done
It's not recommended to put ThreadStaticAttribute on these (static constructors will be executed in one thread only and will set the value for its thread; all other threads will have this value uninitialized)
They must have a value at compilation-time (you can have e.g. 3.14 * 2, but cannot call methods)
Could be declared within functions
Are copied into every assembly that uses them (every assembly gets a local copy of values)
Can be used in attributes
Readonly instance fields
Must have set value by the time constructor exits
Are evaluated when instance is created
Static readonly fields
Are evaluated when code execution hits class reference (when new instance is created or a static method is executed)
Must have an evaluated value by the time the static constructor is done
It's not recommended to put ThreadStaticAttribute on these (static constructors will be executed in one thread only and will set the value for its thread; all other threads will have this value uninitialized)
