List的集合初始化器 <myCustomClass> 不给“； 预期”编译错误。 为什么？

Question

I am trying to initialize a generic collection List something like this:

List<MyCustomClass> myCustomClassList = new List<MyCustomClass>() {myCustomClassInstance1, myCustomClassInstance2};

I am getting the compile error " ; expected ". I don't understand this. Shouldn't I just be able to initialize this collection like this?

Answer 1

What version of .NET are you using? Collection initializers only work in .NET 3.5 and higher

Answer 2

Collection Initializers are part of the C# 3.0 specification and not the .Net Framework/Libraries. The earliest implementation that uses C# 3.0 is VS2008, and the .Net 3.5 framework. You can build against earlier versions of the framework. If you are compiling via script from the command-line, or other IDE, make sure you are referencing the appropriate toolchain: C:\\Windows\\Microsoft.NET\\Framework\\v3.5\\csc.exe