WebNov 22, 2016 · if (obj == null) return false; You do not need to declare a local variable for result, simply return its value where appropriate. You do not have to check condition result == false inside your foreach loop (you … WebJan 27, 2024 · dictionary = null; // This easy statement will ensure your Dictionary functions correctly if it came through as a null and will fix your issue. if (dictionary == null) dictionary = new Dictionary (); // You can now use Dictionary methods. if (!dictionary.ContainsKey ("key")) Console.WriteLine ("key"); Posted 16-Sep-21 0:24am

Is it a good practice to add a "Null" or "None" member to the enum in C#?

WebAdding a "Null" or "None" member to an enum in C# can be a useful practice in certain situations. This can provide a clear and consistent way to represent the absence of a value, which can be helpful for readability and maintainability of code. However, there are also some potential downsides to adding a "Null" or "None" member to an enum. WebFeb 25, 2024 · If you want to check for null or empty, you can use String.IsNullOrEmpty : if (de.TryGetValue ("Name2",out var name)) { var newValue=String.IsNullOrEmpty (name) … grain pattern in wood for spoons

ConcurrentDictionary In C#

WebMay 9, 2016 · Here's the code: bool isEmpty; using (var dictionaryEnum = dictionary.GetEnumerator ()) { isEmpty = !dictionaryEnum.MoveNext (); } Still, this kind … WebTo check if a dictionary is empty, you can either check if the size of the dictionary is zero or use the isEmpty function. var myDictionary: [keyType:valueType] = [:] var isDictEmpty1 = myDictionary.count == 0 var isDictEmpty2 = myDictionary.isEmpty WebJan 27, 2010 · Can you cast it to object and check it it's null? Proposed as answer by Chao Kuo Monday, January 25, 2010 7:21 AM Unproposed as answer by Chao Kuo Monday, January 25, 2010 7:22 AM china national machinery import