qol: interpolated strings

Disco.Services/Authorization/AuthorizationToken.cs

@@ -169,9 +169,9 @@ namespace Disco.Services.Authorization
                     filename = filename.Substring(filename.IndexOf("\\Disco\\Disco.") + 7);
 
                 var method = frame.GetMethod();
-                var resource = string.Format("{0}::{1}", method.DeclaringType.FullName, method.Name);
+                var resource = $"{method.DeclaringType.FullName}::{method.Name}";
                 if (!string.IsNullOrEmpty(filename))
-                    resource = string.Format("{0} [{1}]", resource, filename);
+                    resource = $"{resource} [{filename}]";
 
                 return resource;
             }

Disco.Services/Authorization/ClaimNavigatorItem.cs

@@ -76,7 +76,7 @@ namespace Disco.Services.Authorization
 
         public override string ToString()
         {
-            return string.Format("{0}: {1}={2}", Name, Key, Value);
+            return $"{Name}: {Key}={Value}";
         }
     }
 }

Disco.Services/Authorization/DiscoAuthorizeBaseAttribute.cs

@@ -65,10 +65,10 @@ namespace Disco.Services.Authorization
                 var controllerName = FilterContext.ActionDescriptor.ControllerDescriptor.ControllerName;
                 var actionName = FilterContext.ActionDescriptor.ActionName;
 
-                authResource = string.Format("{0}::{1}", controllerName, actionName);
+                authResource = $"{controllerName}::{actionName}";
             }
 
-            return string.Format("{0} [{1}]", authResource, url);
+            return $"{authResource} [{url}]";
         }
     }
 }