Remove StyleCop suppressions and resolve style issues

[JatinSanghvi]

Adhering to default StyleCop recommendations i.e., using this. in front of the instance variables. This way is more consistent since otherwise we use variables with names like _varName for private instance fields, and names like VarName for public and private static fields and public instance properties. When referencing one of these variables in rest of the class, having this. prefixed makes it clear to the reader whether instance or static or local variable is being accessed. In that case, the underscore prefix becomes irrelevant. Similar justification can be found in StyleCop documentation here and here.

[v-shenoy]

LGTM!