private async Task HeavyMethod(string filePath)
{
FileReadWrite fileReadWrite = new FileReadWrite();
fileReadWrite.ReadFileFromPath(filePath, firstRowHaveHeader);
AllRows allColumns = AllRows.GetInstance();
for (int i = 0; i < allColumns.FullFile[0].Value.Count; i++)
{
Binding binding = new Binding(String.Format("Value[{0}]", i));
DataGridTextColumn column = new DataGridTextColumn();
//binding.Converter = new PricesConverter();
binding.Mode = BindingMode.TwoWay;
binding.ValidatesOnDataErrors = true;
column.Binding = binding;
column.CanUserSort = false;
column.Header = allColumns.HeaderName[i];
dataGrid.Columns.Add(column);
}
dataGrid.ItemsSource = allColumns.FullFile;
ComboBoxFill();
await Task.Delay(50);
}