c# variable naming convention

Without a context, these identifiers all look indistinguishable.

Argument passed in? arg_
Local temp variables? tmp_
Fields? Just qualify it with this.field1 or MyClass.field1
Events? Just qualify ith with this.event1 or MyClass.event1
Properties? CapitalizeFirstLetter. Actually, these are primarily used outside host class. In such cases they are fairly identifiable.