System.NullReferencException

A NullReferenceException occurs when you try to use a method or property of a reference type (C#, Visual Basic) whose value is null.

Refer MSDN article here for more details:

https://msdn.microsoft.com/en-us/library/sxw2ez55.aspx

NULL reference occurs when u are trying to use the properties of the Object without initialising it

try to debug the things and set the breakpoint u will get the Exact Location

no one will help u with this explanation

Hello

You have not specified where you faced this error

Still you can check :

Problem may be that , you are accessing something and its null , so try debugging and check where it happening

Thanks

Hi, Null refrence error means you are trying to get the value from the null obect.

before get/set for the property of the object. make sure your object is declared and values is there meanse check (object != null).