c# loop through dictionary keys and modify each code example

Example 1: c# dictionary loop key value

foreach(KeyValuePair<string, string> entry in myDictionary)
{
    // do something with entry.Value or entry.Key
}

Example 2: c# modify dictionary in loop

List<string> keys = new List<string>(colStates.Keys);
foreach(string key in keys)
{
    colStates[key] +=  4;   
}