Open and Close variable identifiers now properly used

Author: CodingMadeEasy

C9S.Extensions.Configuration/ConfigurationRootExtensions.cs

@@ -27,7 +27,9 @@ private static void GetAllConfigurationSections(IEnumerable<IConfigurationSectio
 
         private static void VariableResolver(IConfiguration Configuration, string open, string close)
         {
-            var variableRegex = new Regex($@"({open})(?!.*{open})(?<var>[^{close}]+)\{close}");
+            var open_esc = Regex.Escape(open);
+            var close_esc = Regex.Escape(close);
+            var variableRegex = new Regex($@"({open_esc})(?!.*{open_esc})(?<var>[^{close_esc}]+)\{close_esc}");
             while (configSections.Any())
             {
                 var currentSection = configSections.First();
@@ -58,7 +60,7 @@ private static void VariableResolver(IConfiguration Configuration, string open,
                         section = section.GetSection(sec);
                     }
 
-                    currentSection.Value = currentSection.Value.Replace($"{{{{{variable}}}}}", section.Value ?? section[key]);
+                    currentSection.Value = currentSection.Value.Replace($"{open}{variable}{close}", section.Value ?? section[key]);
                     configSections.Add(currentSection);
                 }
             }

Samples/VariableInVariable/Program.cs

@@ -15,7 +15,7 @@ static void Main(string[] args)
 
             var configuration = builder.Build();
 
-            configuration.ResolveVariables();
+            configuration.ResolveVariables("${", "}");
 
             Console.WriteLine(configuration.GetSection("Auth:ClientID"));
         }

Samples/VariableInVariable/appsettings.json

@@ -7,6 +7,6 @@
     },
     "Auth":
     {
-        "ClientID": "{{App.{{ASPNETCORE_ENVIRONMENT}}.ClientId}}"
+        "ClientID": "${App.${ASPNETCORE_ENVIRONMENT}.ClientId}"
     }
 }