diff --git a/BlazorApp/Data/Calendar.cs b/BlazorApp/Data/Calendar.cs
index 93147b4..6ddb5ed 100644
--- a/BlazorApp/Data/Calendar.cs
+++ b/BlazorApp/Data/Calendar.cs
@@ -49,24 +49,15 @@ namespace BlazorApp.Data
                     continue;
                 }
 
-                switch (c)
+                timeSpan += c switch
                 {
-                    case 'W':
-                        timeSpan += TimeSpan.FromDays(value * 7);
-                        break;
-                    case 'D':
-                        timeSpan += TimeSpan.FromDays(value);
-                        break;
-                    case 'H':
-                        timeSpan += TimeSpan.FromHours(value);
-                        break;
-                    case 'M':
-                        timeSpan += TimeSpan.FromMinutes(value);
-                        break;
-                    case 'S':
-                        timeSpan += TimeSpan.FromSeconds(value);
-                        break;
-                }
+                    'W' => TimeSpan.FromDays(value * 7),
+                    'D' => TimeSpan.FromDays(value),
+                    'H' => TimeSpan.FromHours(value),
+                    'M' => TimeSpan.FromMinutes(value),
+                    'S' => TimeSpan.FromSeconds(value),
+                    _ => throw new ArgumentOutOfRangeException($"Invalid time unit {c}")
+                };
 
                 value = 0;
             }