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Why we do not have global variables in C#?
C# does not have global variables and the scope resolution operator used in C++ for global variables is related to namespaces. It is called global namespace alias.
If you have a type that shares an identifier in a different namespace, then to identify them using the scope resolution operator.
For example, to reference System.Console class, use the global namespace alias with the scope resolution operator −
global::System.Console
Let us now see an example −
Example
using myAlias = System.Collections;
namespace Program {
class Demo {
static void Main() {
myAlias::Hashtable h = new myAlias::Hashtable();
h.Add("M", "1");
h.Add("N", "2");
h.Add("O", "3");
h.Add("P", "4");
foreach (string n in h.Keys) {
global::System.Console.WriteLine(n + " " + h[n]);
}
}
}
}Output
N 2 O 3 M 1 P 4
Updated on: 20-Jun-2020
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