Изменение шапок в visual studio 2019

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What hapend in my app?
Can you help me
Change cap in app @oznaka  change to @Oznaka
I must repair all app 
Can you suggets or help me
Thank you

Что я уже пробовал:

<pre><pre>string saveStaff = "declare @maxNo integer = 0 select @maxNo = isnull(max(redni_broj), 0) from [dbo].[jedinica_mjere]; Set @maxNo=@maxNo+1;  INSERT into dbo.jedinica_mjere "  
+ " (redni_broj, Oznaka, ime) "  
+ " VALUES (@maxNo,@Oznaka,@ime)";  
  
using (SqlCommand querySaveStaff = new SqlCommand(saveStaff))  
{  
querySaveStaff.Connection = openCon;  
  
querySaveStaff.Parameters.Add("@Oznaka", SqlDbType.VarChar, 255).Value = oznakaTextBox.Text;  
querySaveStaff.Parameters.Add("@ime", SqlDbType.VarChar, 255).Value = imeTextBox.Text;  

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