c#-集合已修改；可能无法执行枚举操作

 1 foreach (KeyValuePair<string, double> soilStrKV in soil)
 2             {
 3                 if (isValidVal(soilStrKV.Value))
 4                 {
 5                     soil[soilStrKV.Key] = replaceInvalidVal;
 6                     //siteNumStr = soilStrKV.Key.Substring(0, soilStrKV.Key.IndexOf(‘_‘));
 7                     //yearStr 
 8                     //siteSoil.Add();
 9                 }
10             }
11 
12 /// <summary>
13         /// false表示不符合的值,否则符合.
14         /// </summary>
15         /// <param name="inVal"></param>
16         /// <returns></returns>
17         private bool isValidVal(double inVal)
18         {
19             return inVal <= available_val;
20         }