No there is no equivalent in C# (VB and F# as well).
Personally I love this difference. I work in a very large C++ code base and there is no way to look at a particular method and know it's particular accessibility. Some of the classes have gotten so large that it takes a significant amount of page scrolling just to see the modifier.
Some coders may think that's not to bad but consider what happens when people start mixing in #if defs in the middle of the class and adding modifiers within those #if's. It makes determining the access modifier during a code review a non-trivial operation.
It's a small typing sacrifice to add the modifier inline but worth it in terms of long term readability.