Update CodeGeneratorUtils.cs

[mohsenno1]

PR addresses issue #64, where

The "OData Connected Service" wizard invariably fails in the "Finish" step with this error message: "Adding OData Connected Service to the project failed: Value cannot be null. Parameter name: path1".

Problem:

I have the same problem.
Visual Studio 2017 Community 15.2.

I tried to debug it using another instance of visual studio. I got this error:

Could not load file or assembly 'Microsoft.VisualStudio.ConnectedServices.Package2, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.
And, Right after it I got:

"Value cannot be null.\r\nParameter name: path1"

I found a temporary solution:
Go to registry:
[HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Microsoft WCF Data Services]

I my case I found VS 2010 Tooling key.
I made a duplicate of that key and renamed it to VS 2014 Tooling.

Now it's working fine.

But this problem can be solved easily by changing the source code:

In V3CodeGenDescriptor.cs#L32 just needs to be checked that if string.IsNullOrEmpty(wcfDSInstallLocation) and if it is then jump to the else statement.

And this will fix the bug.

[AlanWong-MS]

Needs a quick comment update.

[AlanWong-MS]

Thanks for the fix! Before we merge, can you please update the comment at line 16? It should say that we're returning String.Empty instead of null with your update.

[xuzhg]

merged at: 196d8b8