Cannot insert or append joint array of stringbuilder

[samira388]

i can not insert or append in an array of stringbuilder element as well as a joint one that has the form
stringbuilder [,] str=new stringbuilder[20,2];
for an example
and in every time i had an exception saying
exception {"Object reference not set to an instance of an object."} System.Exception {System.NullReferenceException}
i need a very fast solution please and thank you
new member
samira388

[tlhintoq]

"How do I fix a 'object reference not set to an instance of an object' error?

The line your code stopped on while debugging holds all your answers.
One of the variables/objects was created but not initialized. For example:

string TempString;// Created but not initialized so this is still null
//versus
string TempString = string.empty;

Debug your project again. This time, when it breaks on a line look at the Locals pallet to see which variable/object is null. You can also hover your mouse over each variable and the hothelp will shows its value. One of them will be null.

[samira388]

thanks your answer helps me a lot