Dictionary<string, string> dicDistribution = new Dictionary<string, string>();
            dicDistribution.Add("chi2", "卡方");
            dicDistribution.Add("expon", "指数");
            dicDistribution.Add("f", "F");
            dicDistribution.Add("gamma", "Gamma");
            dicDistribution.Add("logistic", "logistic");
            dicDistribution.Add("loggamma", "对数gamma");
            dicDistribution.Add("lognorm", "对数正态");
            dicDistribution.Add("norm", "正态");
            dicDistribution.Add("t", "T");
            dicDistribution.Add("uniform", "均匀");
            dicDistribution.Add("weibull_min", "Weibull最小");
            dicDistribution.Add("weibull_max", "Weibull最大");

            cmbDistribution1.DataSource = new BindingSource(dicDistribution, null);
            cmbDistribution1.ValueMember = "Key";
            cmbDistribution1.DisplayMember = "Value";
            cmbDistribution1.SelectedValue = "norm";

//绑定KeyValuePair<string, string>
List<KeyValuePair<string, string>> cmbItemList = new List<KeyValuePair<string, string>>();
KeyValuePair<string, string> kvp = new KeyValuePair<string, string>(Program.region, Program.region);

List<string> regionList = Program.region.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries).ToList();
regionList.Sort();

cmbItemList = new List<KeyValuePair<string, string>>();
foreach (var item in regionList)
{
    kvp = new KeyValuePair<string, string>(item, item);
    cmbItemList.Add(kvp);
}
cmbRegion.DataSource = cmbItemList;
cmbRegion.DisplayMember = "Key";
cmbRegion.ValueMember = "Value";
cmbRegion.SelectedIndex = 0;