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C# NullReferenceException
NullReferenceException occurs when you try to to access member fields, or function types that points to null.
Here is an example −
Example
using System;
class Demo {
static void Main() {
string str = null;
if (str.Length > 0) {
Console.WriteLine(str);
}
}
}Output
The following is the output. It throws NullReferenceException, since you are tryonhg access a memebt that points to null −
Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object at Demo.Main () [0x00002] in <0bc5fbf292484d5194a19866ae5c2018>:0 [ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object at Demo.Main () [0x00002] in <0bc5fbf292484d5194a19866ae5c2018>:0
Updated on: 22-Jun-2020
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