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How to capture null reference exception in C#?
It handles errors generated from referencing a null object. The Null reference exception occurs when you are looking to access member fields or function types that points to null.
Let’s say we have the following null string −
string str = null;
Now you try to get the length of the null string, then it would cause an exception −
If(str.Length == null) {}
Above the exception will be thrown. Now let us seen how to prevent the null pointer exception to be thrown −
Example
using System; class Program { static void Main() { int[] arr = new int[5] {1,2,3,4,5}; display(arr); arr = null; display(arr); } static void display(int[] arr) { if (arr == null) { return; } Console.WriteLine(arr.Rank); } }
Output
1
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