Until C# 6.0 the “throw” keyword must be used only as a standalone statement, that is it cannot be part of an expression. C# 7.0 overcomes this limitation, and then allows this keyword to be placed everywhere, e.g. in the middle of a ternary operator:
string a = null;
try
{
// this row doesn't compile in C# 6.0 because of throw statement
a = a != null ? a = " some value" : throw new NullReferenceException("a");
}
catch (Exception ex)
{
a = "some other value";
Console.WriteLine("New throw feature: " + a); // prints "some other value"
}
505 thoughts on “C# 7.0 – #6. Usage expanded for statement “throw””
Comments are closed.