Add dotnet caveat (#48)

* Add dotnet caveat

Dotnet types cannot contain fields of the same name. Therefore, we need to use the `CSharpName` functionality when generating the provider. This PR adds an example.

* Fix markdown

README.md

@@ -105,6 +105,25 @@ The following instructions all pertain to `provider/resources.go`, in the sectio
     "foo_something_else": {Tok: makeResource(mainMod, "SomethingElse")},
     ```
 
+1. **Add CSharpName (if necessary):** Dotnet does not allow for fields named the same as the enclosing type, which sometimes results in errors during the dotnet SDK build.
+    If you see something like 
+    ```text
+    error CS0542: 'ApiKey': member names cannot be the same as their enclosing type [/Users/guin/go/src/github.com/pulumi/pulumi-artifactory/sdk/dotnet/Pulumi.Artifactory.csproj]
+    ``` 
+    you'll want to give your Resource a CSharpName, which can have any value that makes sense:
+
+    ```go
+    "foo_something_dotnet": {
+        Tok: makeResource(mainMod, "SomethingDotnet"),
+        Fields: map[string]*tfbridge.SchemaInfo{
+            "something_dotnet": {
+                CSharpName: "SpecialName",
+            },
+        },
+    },
+    ```
+
+   [See the underlying terraform-bridge code here.](https://github.com/pulumi/pulumi-terraform-bridge/blob/master/pkg/tfbridge/info.go#L168)
 1. **Add data source mappings:** For each data source in the provider, add an entry in the `DataSources` property of the `tfbridge.ProviderInfo`, e.g.:
 
     ```go