Object Reference Not Set to an Instance of an Object

How to solve Object reference not set to an instance of an object.?

You need to initialize the list first:

protected List<string> list = new List<string>();

How do I fix this Object reference not set to an instance of an object error?

csa is an array of instances of a user-defined class called CurryStudent. On line number 11 you instantiated the array of CurryStudent class. Here you forgot to fill an array with its elements that are nothing but an instance of CurryStudent class.

You need to instanciate each element of csa array with an instance of class CurryStudent.
Like,

for(int i = 0; i < csa.Length; i++)
    csa[i] = new CurryStudent();

object reference not set to an instance of object

sef,
If the problem is with Database return results, I presume it is in this scenario:

   dsData = getSQLData(conn,sql, blah,blah....)
   dt = dsData.Tables(0)  'Perhaps the obj ref not set is occurring here

To fix that:

  dsData = getSQLData(conn,sql, blah,blah....)
   If dsData.Tables.Count = 0 Then Exit Sub
   dt = dsData.Tables(0)  'Perhaps the obj ref not set is occurring here

edit: added code formatting tags ...

I am getting Object reference not set to an instance of an object on DateTime pass

"if(dates == null)" - you only get to the code if dates is null

You either want to change the code to "if(dates != null)" or create an instance of whatever class "dates" is before the third line.

Object reference not set to an instance of an object on server. The object is associated with property File when read file from SharePoint

Use Caml Query to filter only files in the library as item.File.Name is used for File not Folder:

                var list = cxt.Web.GetList("/sites/test/Shared%20Documents");
                Microsoft.SharePoint.Client.CamlQuery camlQuery = new CamlQuery();
                camlQuery.ViewXml =
                   @"<View Scope='RecursiveAll'>  
                    <Query> 
                       <Where><Eq><FieldRef Name='FSObjType' /><Value Type='Integer'>0</Value></Eq></Where> 
                    </Query> 
                    </View>";
                var listItems = list.GetItems(camlQuery);
                cxt.Load(listItems,items => items.Include(item => item.File));
                cxt.ExecuteQuery();
               Console.WriteLine(listItems.First().File.Name);

NullReferenceException: Object reference not set to an instance of an object (Unity c#)

I think you add Componenet "ShootingBullet.cs" to other object.
transform.find(~) return child transform or null if no child is found.
you may use
GameObject.FindObjectOfType<Recoil>();
not
transform.Find("CameraRot/CameraRecoil").GetComponent<Recoil>();
or add "ShootingBullet.cs" to right Object.(ex.
CameraRot and use transform.Find("CameraRecoil").GetComponent<Recoil>();
if It worked well, please let me know thanks.

Unity object reference not set to an instance of an object after SetActive false

You have basically answered your question, the GameObject "Starting" is inactive, so it will not find it.
Try referencing it at the start of your game on the CharacterController, like so:

public GameObject startingObject;
private void Start(){
startingObject = GameObject.Find("Starting"); //Find it here, or drag it into the hierarchy
}

then delete this line from the Update():

 starting = GameObject.Find("Starting");

since it is bad practice to use GameObject.Find() inside the Update method anyway.
It is also more preferable to reference Components to the hierarchy than using GameObject.Find(""), if possible of course, but both solutions should work fine

Object reference not set to an instance of an object. While Adding items to Cart using Session in Asp.net mvc

You can check if your Session is not null on your View before you try to cast it and access its properties:

@if(Session["MyCart"] != null)
{
    foreach (var item in (List<Product>)Session["MyCart"])
    {
        
        <li>
            <a href="#" class="photo"><img src="@Url.Content(item.Product_Picture)" class="cart-thumb" alt="" /></a>
            <h6><a href="#">@item.Product_Name </a></h6>
            <p>1x -Rs <span class="price">@item.Product_SalePrice</span></p>
        </li>
     
    }
    </ul>
}
else
{
    <h2>Cart is empty</h2>
}

You should create a partial view for your carts and then refer it where it is required. There are many tutorial for partial views creation and usage You can refer to this tutorial

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