NullReferenceException
If you are trying to access an object, but object have null values that time give the an null reference exception
For example.
static void Main()
{
DataSet ds=new DataSet;
ds=null;
if (ds.Table.Length == 0) // here is an exception
{
// some logc here....
}
}
Output:
System.NullReferenceException: Object reference not set to an instance of an object.
Other example
static void Main()
{
string str = null;
if (str.Length == 0) // here is an exception
{
// some logc here....
}
}
Output:
System.NullReferenceException: Object reference not set to an instance of an object.
If you are trying to access an object, but object have null values that time give the an null reference exception
For example.
static void Main()
{
DataSet ds=new DataSet;
ds=null;
if (ds.Table.Length == 0) // here is an exception
{
// some logc here....
}
}
Output:
System.NullReferenceException: Object reference not set to an instance of an object.
Other example
static void Main()
{
string str = null;
if (str.Length == 0) // here is an exception
{
// some logc here....
}
}
Output:
System.NullReferenceException: Object reference not set to an instance of an object.
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