c# - Create enum with specific values from another enum -

i want create subset enums list system.windows.forms.keys, includes a-z, 0-9, , f keys. currently, set full list combo box on winform:

combobox1.datasource = enum.getvalues(typeof (system.windows.forms.keys));

is there fast way create subset? current workaround hardcode list of acceptable keys:

private list<keys> acceptablekeys = new list<keys>             {                 keys.a,                 keys.b, keys.c, keys.d, keys.e, keys.f, keys.g, keys.h, keys.i, keys.j, keys.k, keys.l, keys.m,                 keys.n, keys.o, keys.p, keys.q, keys.r, keys.s, etc....             }; 

and use datasource.

is there better method this?

if don't want hardcode try checking int value of enum , adding them list.

var enums = enum.getvalues(typeof(keys));  list<keys> acceptablekeys = new list<keys>(); foreach (var e in enums) {    int val = (int)e;    //the boundaries represent a-z, 0-9, f1 - f24 respectively    if ((val >= 65 && val <= 90) || (val >= 48 && val <= 59) || (val >= 112 && val <= 135))        acceptablekeys.add((keys)e); } 

this won't include numbers on numpad can add check if want include well.