System.NullReferenceException' occurred in Online.dll

Question

This Is Error

An exception of type 'System.NullReferenceException' occurred in Online.dll but was not handled in user code

Additional information: Object reference not set to an instance of an object.

My Code Is .. How to fixed that error?

internal global::System.Data.SqlClient.SqlConnection Connection {

get {

if ((this._connection == null)) {

this.InitConnection();

}

return this._connection;

}

set {

this._connection = value;

if ((this.Adapter.InsertCommand != null)) {

this.Adapter.InsertCommand.Connection = value;

}

if ((this.Adapter.DeleteCommand != null)) {

this.Adapter.DeleteCommand.Connection = value;

}

if ((this.Adapter.UpdateCommand != null)) {

this.Adapter.UpdateCommand.Connection = value;

}

for (int i = 0; (i < this.CommandCollection.Length); i = (i + 1)) {

if ((this.CommandCollection[i] != null)) {

((global::System.Data.SqlClient.SqlCommand)(this.CommandCollection[i])).Connection = value;

}

}

}

}