C# nameof operator

by Online Tutorials Library July 22, 2022

C# Nameof Operator

C# NameOf operator is used to get name of a variable, class or method. It returns a simple string as a result.

In error prone code, it is useful to capture a method name, in which error occurred.

We can use it for logging, validating parameters, checking events etc.

Note: if we want to get fully qualified name, we can use typeof expression along with nameof operator.

Let’s see an example that implements nameof operator.

C# Nameof Operator Example 1

 using System; namespace CSharpFeatures {     class NameOfExample     {         public static void Main(string[] args)         {             string name = “tutoraspire”;             // Accessing name of variable and method             Console.WriteLine(“Variable name is: “+nameof(name));             Console.WriteLine(“Method name is: “+nameof(show));         }         static void show()         {             // code statements         }     } } 

Output:

Variable name is: name Method name is: show

We can also use it to get method name in which exception is occurred. See, the following example.

C# Nameof Operator Example 2

 using System; namespace CSharpFeatures {     class NameOfExample     {         int[] arr = new int[5];         public static void Main(string[] args)         {             NameOfExample ex = new NameOfExample();             try             {                 ex.show(ex.arr);             }             catch(Exception e)             {                 Console.WriteLine(e.Message);                 // Displaying method name that throws the exception                 Console.WriteLine(“Method name is: “+nameof(ex.show));             }         }         int show(int[] a)         {             a[6] = 12;             return a[6];         }     } } 

Output:

Index was outside the bounds of the array. Method name is: show

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C# nameof operator

C# Nameof Operator

Note: if we want to get fully qualified name, we can use typeof expression along with nameof operator.

C# Nameof Operator Example 1

C# Nameof Operator Example 2

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