Pattern mathing on generic types does not work

[fanoI]

Version Used:
Visual Studio 2017

Steps to Reproduce:

Create a function like this:

     void TestGenericPatternMatching<T>(T anT)
        {
            switch (anT)
            {
                case int v: 
                    break;
               case string s:
                    break;
            }
        }
```cs

**Expected Behavior**:
Pattern matching works

**Actual Behavior**:
The code above does not compiles with a strange error "an expression of type T can not be handled by an int", the match with object is OK but well not really useful (anything matches with object).

[sharwell]

This looks like a duplicate of #16195. If this is not correct let me know! 👍

[sharwell]

📝 Also very relevant is dotnet/csharplang#154.

[fanoI]

But then there will be a 7.1 version of C# to download? Or we have to wait until C# 8.0?
It seems really a big bug!

[sharwell]

@fanoI The milestone indicators say 7.1, but those aren't always correct. Best way to find out would be to ask in one of the linked issues. 😄