错误 CS0103：当前上下文中不存在名称“IsInRole”

Question

I have this line into my web service project. This is supposed to check if the current principal has the role of Viewer.

CODE

System.Threading.Thread.CurrentPrincipal.IsInRole("Viewer")

This throws an error like IsInRole("Viewer") is not into context. Please help what to write here.

Answer 1

Out of context typically means you have code where it shouldn't be, or attempting to access a variable that is not within scope. See screenshot below for an example of code statement in wrong place semantically.

Another example is declaring a variable in a try block and trying to access it from the catch block. The curly braces in C# define scope, the try and catch scopes are separate therefore, variables declared in the try block are not accessible from the catch block.