Check out example codes for "switch case c# contains". It will help you in understanding the concepts better.

Code Example 1

Correct final syntax for [Mr. C]s answer.

With the release of VS2017RC and its C#7 support it works this way:

switch(message)
{
    case string a when a.Contains("test2"): return "no";
    case string b when b.Contains("test"): return "yes";
}
You should take care of the case ordering as the first match will be picked. That's why "test2" is placed prior to test.

Learn ReactJs, React Native from akashmittal.com