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Okay, let's dive into how to change row colors in a DataGridView in various scenarios, along with detailed explanations and code examples in both C# and VB.NET.

*Understanding the Basics*

The DataGridView control in .NET provides extensive options for customizing its appearance, including the ability to change the background and foreground colors of individual rows based on certain criteria. This allows you to visually highlight specific data based on its content, status, or any other logic you need to apply.

*Key Properties and Events*

**`DefaultCellStyle`**: This property of the DataGridView affects the default style for all cells.
**`Rows[index].DefaultCellStyle`**: This property allows you to modify the style (including the background color) for a specific row at the given index.
**`Rows[index].Cells[columnIndex].Style`**: This gives control to individual cell style modification
**`CellFormatting` Event**: This event is raised when the content of a cell needs to be formatted for display. It's useful for applying conditional formatting based on cell values.
**`RowPrePaint` Event**: This event is raised before a row is painted. This can be used to change the appearance of the entire row. It's great for applying row-level formatting.

*Common Scenarios and Code Examples*

Let's explore different scenarios with code examples in both C# and VB.NET:

*1. Changing Row Color Based on a Specific Cell Value (Simple Case)*

This is the most common scenario: You want to change the row's color if a particular cell contains a specific value. For example, you might want to highlight rows where the "Status" column has the value "Completed".

**C#numpy


*VB.NET*



*Explanation:*

1. *`ApplyRowColors()` Function:* This function iterates through each row in the `DataGridView`.

2. *`row.IsNewRow` Check:* We check `row.IsNewRow` to avoid attempting to modify the automatically added "new row" at the bottom of the grid.

3. **`row.Cells[ ...

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