Why can't we assign a foreach iteration variable, whereas we can completely modify it with an accessor?

Question

I was just curious about this: the following code will not compile, because we cannot modify a foreach iteration variable:

        foreach (var item in MyObj         


        

Answer 1

Use for loop instead of foreach loop and assign value. it will work

foreach (var a in FixValue)
{
    for (int i = 0; i < str.Count(); i++)
    {
       if (a.Value.Contains(str[i]))
           str[i] = a.Key;
    }
 }