How to delete entries from a dictionary using the value

Question

I have a dictionary collection as bleow:

mydic.addvalue(key1, val1)
mydic.addvalue(key2, val1)
mydic.addvalue(key3, val1)
mydic.addvalue(key4, val2)
mydic.ad         


        

Answer 1

foreach(var key in dict.AllKeys.ToArray())
{
    if(...)
        //remove key or something
}