how to change element of struct in a list c#? -

this question has answer here:

public struct rectangle {    public decimal a; }

that struct , have list of struct rectangles

list<rectangle> datarectangle= new list<rectangle>();

now have added structs list change value of struct present in list

datarectangle[0].a=0;

it says

cannot modify return value ' list<form4.rectangle>.this[int] ' because not variable

help why coming , there way modify

a struct value type. in contrast reference type class don't pass around references instance, pass around value itself.

so returned indexer datarectangle[0] not reference struct copy of struct. , it's passed on stack no variable itself.

to solve this, can either declare rectangle class (which prefer mutable type:

public struct rectangle {    public decimal {get; set;} }

or (as ugly looks) have reassignment like

datarectangle[0] = new rectangle{a=0};

M16