The Contains method in the VB.NET String Class check the specified parameter String exist in the String

System.String.Contains(String str) As Boolean

Parameters:

String str - input String for search

Returns:

Boolean - Yes/No

If the str Contains in the String then it returns true

If the str does not Contains in the String it returns False

For ex: "This is a Test".Contains("is") return True

"This is a Test".Contains("yes") return False

Exceptions:

System.ArgumentNullException : If the argument is null

VB.NET SourceCode