diff --git a/RhSolutions.AddIn/ExcelTable/ExcelColumn.cs b/RhSolutions.AddIn/ExcelTable/ExcelColumn.cs
new file mode 100644
index 0000000..7d72cd5
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelColumn.cs
@@ -0,0 +1,47 @@
+using System.Collections;
+
+namespace RhSolutions.ExcelTable;
+
+public sealed class ExcelColumn : ExcelTable, IEnumerable<ExcelTableCell>
+{
+    public string Header
+    {
+        get => Range.Cells[1, 1].Value.ToString();
+    }
+    public int Index
+    {
+        get => Range.Column - ParentTable.Range.Column;
+    }
+    public int Length
+    {
+        get => Range.Rows.Count;
+    }
+
+    public ExcelColumn(Range range, ExcelTable table) : base(range, table)
+    {
+        Range = range;
+        ParentTable = table;
+    }
+
+    public ExcelTableCell this[int index]
+    {
+        get => new(Range.Cells[index + 1, 1], ParentTable);
+    }
+
+    public IEnumerator<ExcelTableCell> GetEnumerator()
+    {
+        return new ExcelColumnEnumerator(Range, ParentTable);
+    }
+
+    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+
+
+    public ExcelColumn AddLeft()
+    {
+        Range.EntireColumn
+            .Insert(XlInsertShiftDirection.xlShiftToRight,
+                XlInsertFormatOrigin.xlFormatFromRightOrBelow);
+
+        return ParentTable.Columns[this.Index - 1];
+    }
+}
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelColumnEnumerator.cs b/RhSolutions.AddIn/ExcelTable/ExcelColumnEnumerator.cs
new file mode 100644
index 0000000..c809c18
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelColumnEnumerator.cs
@@ -0,0 +1,54 @@
+using System.Collections;
+
+namespace RhSolutions.ExcelTable;
+
+public class ExcelColumnEnumerator : IEnumerator<ExcelTableCell>
+{
+    public Range Range { get; }
+    public ExcelTable ParentTable { get; }
+    private int position = 0;
+    object IEnumerator.Current
+    {
+        get
+        {
+            return Current;
+        }
+    }
+
+    public ExcelTableCell Current
+    {
+        get
+        {
+            try
+            {
+                return new ExcelTableCell(Range.Cells[position, 1], ParentTable);
+            }
+            catch (IndexOutOfRangeException)
+            {
+                throw new InvalidOperationException();
+            }
+        }
+    }
+
+    public ExcelColumnEnumerator(Range range, ExcelTable table)
+    {
+        Range = range;
+        ParentTable = table;
+    }
+
+    public bool MoveNext()
+    {
+        position++;
+        return (position <= Range.Rows.Count);
+    }
+
+    public void Reset()
+    {
+        position = 0;
+    }
+
+    public void Dispose()
+    {
+
+    }
+}
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelColumns.cs b/RhSolutions.AddIn/ExcelTable/ExcelColumns.cs
new file mode 100644
index 0000000..4aacd6f
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelColumns.cs
@@ -0,0 +1,39 @@
+using System.Collections;
+
+namespace RhSolutions.ExcelTable;
+
+public class ExcelColumns : IEnumerable<ExcelColumn>
+{
+    public Range Range { get; }
+    public ExcelTable ParentTable { get; }
+    public int Length
+    {
+        get => Range.Columns.Count;
+    }
+
+    public ExcelColumns(Range range, ExcelTable parentTable)
+    {
+        Range = range;
+        ParentTable = parentTable;
+    }
+
+    public ExcelColumn this[int index]
+    {
+        get
+        {
+            if (index < 0 || index + 1 > Range.Columns.Count)
+            {
+                throw new IndexOutOfRangeException();
+            }
+
+            return new ExcelColumn(Range.Columns[index + 1], ParentTable);
+        }
+    }
+
+    public IEnumerator<ExcelColumn> GetEnumerator()
+    {
+        return new ExcelColumnsEnumerator(Range, ParentTable);
+    }
+
+    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+}
\ No newline at end of file
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelColumnsEnumerator.cs b/RhSolutions.AddIn/ExcelTable/ExcelColumnsEnumerator.cs
new file mode 100644
index 0000000..8c351e9
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelColumnsEnumerator.cs
@@ -0,0 +1,54 @@
+using System.Collections;
+
+namespace RhSolutions.ExcelTable;
+
+public class ExcelColumnsEnumerator: IEnumerator<ExcelColumn>
+{
+    public Range Range { get; }
+    public ExcelTable ParentTable { get; }
+    private int position = 0;
+    object IEnumerator.Current
+    {
+        get
+        {
+            return Current;
+        }
+    }
+
+    public ExcelColumn Current
+    {
+        get
+        {
+            try
+            {
+                return new ExcelColumn(Range.Columns[position], ParentTable);
+            }
+            catch (IndexOutOfRangeException)
+            {
+                throw new InvalidOperationException();
+            }
+        }
+    }
+
+    public ExcelColumnsEnumerator(Range range, ExcelTable table)
+    {
+        Range = range;
+        ParentTable = table;
+    }
+
+    public bool MoveNext()
+    {
+        position++;
+        return (position <= Range.Columns.Count);
+    }
+
+    public void Reset()
+    {
+        position = 0;
+    }
+
+    public void Dispose()
+    {
+
+    }
+}
\ No newline at end of file
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelRow.cs b/RhSolutions.AddIn/ExcelTable/ExcelRow.cs
new file mode 100644
index 0000000..231fd7c
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelRow.cs
@@ -0,0 +1,33 @@
+using System.Collections;
+
+namespace RhSolutions.ExcelTable;
+
+public sealed class ExcelRow : ExcelTable, IEnumerable<ExcelTableCell>
+{
+    public int Index
+    {
+        get => Range.Row - ParentTable.Range.Row;
+    }
+    public int Length
+    {
+        get => Range.Columns.Count;
+    }
+
+    public ExcelRow(Range range, ExcelTable table) : base(range, table)
+    {
+        Range = range;
+        ParentTable = table;
+    }
+
+    public ExcelTableCell this[int index]
+    {
+        get => new(Range.Cells[1, index + 1], ParentTable);
+    }
+
+    public IEnumerator<ExcelTableCell> GetEnumerator()
+    {
+        return new ExcelRowEnumerator(Range, ParentTable);
+    }
+
+    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+}
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelRowEnumerator.cs b/RhSolutions.AddIn/ExcelTable/ExcelRowEnumerator.cs
new file mode 100644
index 0000000..58f88d8
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelRowEnumerator.cs
@@ -0,0 +1,54 @@
+using System.Collections;
+
+namespace RhSolutions.ExcelTable;
+
+public class ExcelRowEnumerator : IEnumerator<ExcelTableCell>
+{
+    public Range Range { get; }
+    public ExcelTable ParentTable { get; }
+    private int position = 0;
+    object IEnumerator.Current
+    {
+        get
+        {
+            return Current;
+        }
+    }
+
+    public ExcelTableCell Current
+    {
+        get
+        {
+            try
+            {
+                return new ExcelTableCell(Range.Cells[1, position], ParentTable);
+            }
+            catch (IndexOutOfRangeException)
+            {
+                throw new InvalidOperationException();
+            }
+        }
+    }
+
+    public ExcelRowEnumerator(Range range, ExcelTable parentTable)
+    {
+        Range = range;
+        ParentTable = parentTable;
+    }
+
+    public bool MoveNext()
+    {
+        position++;
+        return (position <= Range.Columns.Count);
+    }
+
+    public void Reset()
+    {
+        position = 0;
+    }
+
+    public void Dispose()
+    {
+
+    }
+}
\ No newline at end of file
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelRows.cs b/RhSolutions.AddIn/ExcelTable/ExcelRows.cs
new file mode 100644
index 0000000..44602f0
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelRows.cs
@@ -0,0 +1,39 @@
+using System.Collections;
+
+namespace RhSolutions.ExcelTable;
+
+public class ExcelRows : IEnumerable<ExcelRow>
+{
+    public Range Range { get; }
+    public ExcelTable ParentTable { get; }
+    public int Length
+    {
+        get => Range.Rows.Count;
+    }
+
+    public ExcelRows(Range range, ExcelTable parentTable)
+    {
+        Range = range;
+        ParentTable = parentTable;
+    }
+
+    public ExcelRow this[int index]
+    {
+        get
+        {
+            if (index < 0 || index + 1 > Range.Rows.Count)
+            {
+                throw new IndexOutOfRangeException();
+            }
+
+            return new ExcelRow(Range.Rows[index + 1], ParentTable);
+        }
+    }
+
+    public IEnumerator<ExcelRow> GetEnumerator()
+    {
+        return new ExcelRowsEnumerator(Range, ParentTable);
+    }
+
+    IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+}
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelRowsEnumerator.cs b/RhSolutions.AddIn/ExcelTable/ExcelRowsEnumerator.cs
new file mode 100644
index 0000000..e5430d1
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelRowsEnumerator.cs
@@ -0,0 +1,55 @@
+using System.Collections;
+
+namespace RhSolutions.ExcelTable;
+
+public class ExcelRowsEnumerator : IEnumerator<ExcelRow>
+{
+    public Range Range { get; }
+    public ExcelTable ParentTable { get; }
+    private int position = 0;
+    object IEnumerator.Current
+    {
+        get
+        {
+            return Current;
+        }
+    }
+
+    public ExcelRow Current
+    {
+        get
+        {
+            try
+            {
+                return new ExcelRow(Range.Rows[position], ParentTable);
+            }
+            catch (IndexOutOfRangeException)
+            {
+                throw new InvalidOperationException();
+            }
+        }
+    }
+
+    public ExcelRowsEnumerator(Range range, ExcelTable table)
+    {
+        Range = range;
+        ParentTable = table;
+    }
+
+    public bool MoveNext()
+    {
+        position++;
+        return (position <= Range.Rows.Count);
+    }
+
+    public void Reset()
+    {
+        position = 0;
+    }
+
+    public void Dispose()
+    {
+
+    }
+
+}
\ No newline at end of file
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelTable.cs b/RhSolutions.AddIn/ExcelTable/ExcelTable.cs
new file mode 100644
index 0000000..2788036
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelTable.cs
@@ -0,0 +1,53 @@
+namespace RhSolutions.ExcelTable;
+
+public class ExcelTable
+{
+    public Range Range { get; protected set; }
+    public ExcelTable ParentTable { get; protected set; }
+    public ExcelRows Rows { get; }
+    public ExcelColumns Columns { get; }
+
+    public ExcelTable(Range range)
+    {
+        Range = range;
+        ParentTable = null;
+        Rows = new ExcelRows(Range, this);
+        Columns = new ExcelColumns(Range, this);
+    }
+
+    public ExcelTable(Range range, ExcelTable table)
+    {
+        Range = range;
+        ParentTable = table;
+        Rows = new ExcelRows(Range, this);
+        Columns = new ExcelColumns(Range, this);
+    }
+
+    public ExcelTableCell this[int row, int column]
+    {
+        get => new(Range.Cells[row + 1, column + 1], this);
+    }
+
+    public IEnumerable<ExcelTableCell> Find(object item)
+    {
+        Range firstFound = Range.Find(item);
+        if (firstFound == null)
+        {
+            yield break;
+        }
+
+        Range nextFound = firstFound;
+
+        while (true)
+        {
+            yield return new ExcelTableCell(nextFound, ParentTable ?? this);
+            nextFound = Range.FindNext(nextFound);
+
+            if (nextFound.Row == firstFound.Row
+                && nextFound.Column == firstFound.Column)
+            {
+                yield break;
+            }
+        }
+    }
+}
diff --git a/RhSolutions.AddIn/ExcelTable/ExcelTableCell.cs b/RhSolutions.AddIn/ExcelTable/ExcelTableCell.cs
new file mode 100644
index 0000000..8f742d2
--- /dev/null
+++ b/RhSolutions.AddIn/ExcelTable/ExcelTableCell.cs
@@ -0,0 +1,24 @@
+namespace RhSolutions.ExcelTable;
+
+public sealed class ExcelTableCell : ExcelTable
+{
+    public ExcelRow ParentRow
+    {
+        get => ParentTable.Rows[ParentTable.Range.Row - Range.Row];
+    }
+    public ExcelColumn ParentColumn
+    {
+        get => ParentTable.Columns[ParentTable.Range.Column - Range.Column];
+    }
+    public object Value
+    {
+        get => Range.Cells[1, 1].Value2;
+        set => Range.Cells[1, 1].Value2 = value;
+    }
+
+    public ExcelTableCell(Range range, ExcelTable table) : base(range, table)
+    {
+        Range = range;
+        ParentTable = table;
+    }
+}
diff --git a/RhSolutions.AddIn/RhSolutions.AddIn.csproj b/RhSolutions.AddIn/RhSolutions.AddIn.csproj
index 59173c5..81fcb6a 100644
--- a/RhSolutions.AddIn/RhSolutions.AddIn.csproj
+++ b/RhSolutions.AddIn/RhSolutions.AddIn.csproj
@@ -3,7 +3,7 @@
 		<TargetFrameworks>net472;net6.0-windows7.0</TargetFrameworks>
 		<LangVersion>10</LangVersion>
 		<OutputType>Library</OutputType>
-		<RootNamespace>RhSolutions.AddIn</RootNamespace>
+		<RootNamespace>RhSolutions</RootNamespace>
 		<AssemblyName>RhSolutions.AddIn</AssemblyName>
 		<GenerateAssemblyInfo>false</GenerateAssemblyInfo>
 		<UseWindowsForms>true</UseWindowsForms>
diff --git a/RhSolutions.Tests/ExcelTablesTests.cs b/RhSolutions.Tests/ExcelTablesTests.cs
new file mode 100644
index 0000000..3ce71bc
--- /dev/null
+++ b/RhSolutions.Tests/ExcelTablesTests.cs
@@ -0,0 +1,65 @@
+namespace RhSolutions.Tests;
+
+[ExcelTestSettings(OutOfProcess = true, Workbook = @"TestWorkbooks\ExcelTableTest.xlsx")]
+public class ExcelTablesTests : IDisposable
+{
+    ExcelTable.ExcelTable table;
+
+    public ExcelTablesTests()
+    {
+        Util.Application.Workbooks.Add();
+
+        Worksheet worksheet = Util.Workbook.Sheets[1];
+        Range range = worksheet.Range["E7:G9"];
+        table = new(range);
+    }
+
+    [ExcelFact]
+    public void CanReadExcelTable()
+    {
+        Assert.Equal(3, table.Columns.Where(c => c.Header.StartsWith("Столбец")).Count());
+        Assert.Equal("Столбец 1", table.Rows.First()[0].Value);
+        Assert.Equal("Столбец 2", table[0, 1].Value);
+        Assert.Equal(123d, table[1, 1].Value);
+        Assert.Null(table[1, 2].Value);
+    }
+
+    [ExcelFact]
+    public void CanModifyTableCells()
+    {
+        table[2, 1].Value = 1;
+        table[1, 1].Value = (double)table[1, 1].Value + 123;
+        Assert.Equal(1d, table[2, 1].Value);
+        Assert.Equal(246d, table[1, 1].Value);
+    }
+
+    [ExcelFact]
+    public void CanFindInTable()
+    {
+        table[2, 0].Value = "Find!";
+        table[2, 1].Value = "Find this!";
+        table[2, 2].Value = "Find that!";
+
+
+        var cells = table.Find("Find");
+        Assert.Collection(cells, item => Assert.Equal("Find!", item.Value),
+            item => Assert.Equal("Find this!", item.Value),
+            item => Assert.Equal("Find that!", item.Value));
+        Assert.Equal(0, table.Find("Значение").First().ParentColumn.Index);
+        Assert.Equal(3, table.Rows[2].Find("Find").Count());
+        Assert.Empty(table.Columns[1].Find("Пусто"));
+    }
+
+    [ExcelFact]
+    public void CanAddColumns()
+    {
+        int originalCount = table.Columns.Count();
+        table.Columns[1].AddLeft();
+        Assert.Equal(originalCount + 1, table.Columns.Count());
+    }
+
+    public void Dispose()
+    {
+        Util.Application.ActiveWindow.Close(SaveChanges: false);
+    }
+}
diff --git a/RhSolutions.Tests/RhSolutions.Tests.csproj b/RhSolutions.Tests/RhSolutions.Tests.csproj
index aeb9c9e..9410802 100644
--- a/RhSolutions.Tests/RhSolutions.Tests.csproj
+++ b/RhSolutions.Tests/RhSolutions.Tests.csproj
@@ -24,6 +24,9 @@
 	  <None Update="TestWorkbooks\EmptyWorkbook.xlsx">
 	    <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
 	  </None>
+	  <None Update="TestWorkbooks\ExcelTableTest.xlsx">
+	    <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+	  </None>
 	</ItemGroup>
 
 </Project>
diff --git a/RhSolutions.Tests/TestWorkbooks/ExcelTableTest.xlsx b/RhSolutions.Tests/TestWorkbooks/ExcelTableTest.xlsx
new file mode 100644
index 0000000..da4cf0b
Binary files /dev/null and b/RhSolutions.Tests/TestWorkbooks/ExcelTableTest.xlsx differ
diff --git a/RhSolutions.Tests/Usings.cs b/RhSolutions.Tests/Usings.cs
index 74130ca..4b95659 100644
--- a/RhSolutions.Tests/Usings.cs
+++ b/RhSolutions.Tests/Usings.cs
@@ -1,5 +1,5 @@
 global using Xunit;
 global using Microsoft.Office.Interop.Excel;
 global using ExcelDna.Testing;
-global using RhSolutions.Models;
+global using RhSolutions.ExcelTable;
 global using RhSolutions.Services;
diff --git a/RhSolutions.Tests/RhSolutionsCheckTest.cs b/RhSolutions.Tests/WorkbookValidationTests.cs
similarity index 72%
rename from RhSolutions.Tests/RhSolutionsCheckTest.cs
rename to RhSolutions.Tests/WorkbookValidationTests.cs
index f4d1317..aec7139 100644
--- a/RhSolutions.Tests/RhSolutionsCheckTest.cs
+++ b/RhSolutions.Tests/WorkbookValidationTests.cs
@@ -1,9 +1,9 @@
 namespace RhSolutions.Tests;
 
 [ExcelTestSettings(OutOfProcess = true)]
-public class WorkbookCheck : IDisposable
+public class WorkbookValidationTests : IDisposable
 {
-    public WorkbookCheck()
+    public WorkbookValidationTests()
     {
         Util.Application.Workbooks.Add();
     }
@@ -11,7 +11,7 @@ public class WorkbookCheck : IDisposable
     [ExcelFact(Workbook = @"TestWorkbooks\EmptyTestTable.xlsx")]
     public void WorksheetIsCorrect()
     {
-        Worksheet worksheet= Util.Workbook.Sheets[1];
+        Worksheet worksheet = Util.Workbook.Sheets[1];
         Assert.True(worksheet.IsRehauSource());
     }
 
@@ -24,6 +24,6 @@ public class WorkbookCheck : IDisposable
 
     public void Dispose()
     {
-        Util.Application.ActiveWorkbook.Close(SaveChanges: false);
+        Util.Application.ActiveWindow.Close(SaveChanges: false);
     }
-}
+}
\ No newline at end of file