Object reference not set to an instance of an object.

An Object is an instance of a Class , it is stored some where in memory. A reference is what is used to describe the pointer to the memory location where the Object resides. The message "object reference not set to an instance of an object" means that you are referring to an object the does not exist or was deleted or cleaned up. It's usually better to avoid a NullReferenceException than to handle it after it occurs. To prevent the error, objects that could be null should be tested for null before being used.

if (mClass != null)
{
// Go ahead and use mClass
mClass.property = ...
}
else
{
// Attempting to use mClass here will result in NullReferenceException
}

Hi Malcom, I having this "object reference not set to an instance of an object" problem. Where I can find the text file to insert these lines?

Hi Malcom, I having this "object reference not set to an instance of an object" problem. Where I can find the text file to insert these lines?