Change caps in visual studio 2019

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

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;