When you use generic types defined with type parameters, it's useful to know exactly what types are specified for current parameters. Using the Navigate to Generic Substitutions feature you can get the list of all types that substitute this type parameter and all places where each substitution is used.
Place the caret at the parameter to be investigated, press Ctrl+Shift+GAlt+~,
then click Generic Substitutions.
ReSharper searches for the types that are used to substitute the generic parameter TKeyClass and displays gathered information in the Find Results window. By default substitutions are grouped by type.
You can drill down into the tree to find out the exact locations where a particular type is used and navigate directly to its usages in sources.