devexpress.spreadsheet

https://documentation.devexpress.com/CoreLibraries/DevExpress.Spreadsheet.Range.class

// A range that includes cells from the top left cell (A1) to the bottom right cell (B5).
Range rangeA1B5 = worksheet["A1:B5"];

// A rectangular range that includes cells from the top left cell (C5) to the bottom right cell (E7).
Range rangeC5E7 = worksheet["C5:E7"];

// The C4:E7 cell range located in the "Sheet3" worksheet.
Range rangeSheet3C4E7 = workbook.Range["Sheet3!C4:E7"];

// A range that contains a single cell (E7).
Range rangeE7 = worksheet["E7"];

// A range that includes the entire column A.
Range rangeColumnA = worksheet["A:A"];

// A range that includes the entire row 5.
Range rangeRow5 = worksheet["5:5"];

// A minimal rectangular range that includes all listed cells: C6, D9 and E7.
Range rangeC6D9E7 = worksheet.Range.Parse("C6:D9:E7");

// A rectangular range whose left column index is 0, top row index is 0,
// right column index is 3 and bottom row index is 2. This is the A1:D3 cell range.
Range rangeA1D3 = worksheet.Range.FromLTRB(0, 0, 3, 2);

// A range that includes the intersection of two ranges: C5:E10 and E9:G13.
// This is the E9:E10 cell range.
Range rangeE9E10 = worksheet["C5:E10 E9:G13"];

// Create a defined name for the D20:G23 cell range.
worksheet.DefinedNames.Add("MyNamedRange", "Sheet1!$D$20:$G$23");
// Access a range by its defined name.
Range rangeD20G23 = worksheet["MyNamedRange"];

Range rangeA1D4 = worksheet["A1:D4"];
Range rangeD5E7 = worksheet["D5:E7"];
Range rangeRow11 = worksheet["11:11"];
Range rangeF7 = worksheet["F7"];

// Create a complex range using the Range.Union method.
Range complexRange1 = worksheet["A7:A9"].Union(rangeD5E7);

// Create a complex range using the IRangeProvider.Union method.
Range complexRange2 = worksheet.Range.Union(new Range[] { rangeRow11, rangeA1D4, rangeF7 });

// Fill the ranges with different colors.
complexRange1.FillColor = myColor1;
complexRange2.FillColor = myColor2;

// Use the Areas property to get access to a component of a complex range.
complexRange2.Areas[2].FillColor = Color.Beige;