diff --git a/src/Numerics.IO/LinearAlgebra/Complex/IO/DelimitedReader.cs b/src/Numerics.IO/LinearAlgebra/Complex/IO/DelimitedReader.cs
index 03f108d0..d38b33f5 100644
--- a/src/Numerics.IO/LinearAlgebra/Complex/IO/DelimitedReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/Complex/IO/DelimitedReader.cs
@@ -36,6 +36,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex.IO
     /// specify a delimiter, then any whitespace is used.
     /// </summary>
     /// <typeparam name="TMatrix">The type of the matrix to return.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Text instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class DelimitedReader<TMatrix> : DelimitedReader<TMatrix, Complex>
         where TMatrix : Matrix<Complex>
     {
diff --git a/src/Numerics.IO/LinearAlgebra/Complex/IO/MatlabReader.cs b/src/Numerics.IO/LinearAlgebra/Complex/IO/MatlabReader.cs
index 1f838d96..5012ed14 100644
--- a/src/Numerics.IO/LinearAlgebra/Complex/IO/MatlabReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/Complex/IO/MatlabReader.cs
@@ -24,6 +24,8 @@
 // OTHER DEALINGS IN THE SOFTWARE.
 // </copyright>
 
+using System;
+
 namespace MathNet.Numerics.LinearAlgebra.Complex.IO
 {
     using System.IO;
@@ -32,6 +34,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex.IO
     /// <summary>
     /// Creates matrices from Matlab files.
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class MatlabMatrixReader : MatlabMatrixReader<System.Numerics.Complex>
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/Complex32/IO/DelimitedReader.cs b/src/Numerics.IO/LinearAlgebra/Complex32/IO/DelimitedReader.cs
index b29cc993..7e39cd9a 100644
--- a/src/Numerics.IO/LinearAlgebra/Complex32/IO/DelimitedReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/Complex32/IO/DelimitedReader.cs
@@ -36,6 +36,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32.IO
     /// specify a delimiter, then any whitespace is used.
     /// </summary>
     /// <typeparam name="TMatrix">The type of the matrix to return.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Text instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class DelimitedReader<TMatrix> : DelimitedReader<TMatrix, Complex32>
         where TMatrix : Matrix<Complex32>
     {
diff --git a/src/Numerics.IO/LinearAlgebra/Complex32/IO/MatlabReader.cs b/src/Numerics.IO/LinearAlgebra/Complex32/IO/MatlabReader.cs
index 534f1eac..640e1aba 100644
--- a/src/Numerics.IO/LinearAlgebra/Complex32/IO/MatlabReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/Complex32/IO/MatlabReader.cs
@@ -24,6 +24,8 @@
 // OTHER DEALINGS IN THE SOFTWARE.
 // </copyright>
 
+using System;
+
 namespace MathNet.Numerics.LinearAlgebra.Complex32.IO
 {
     using System.IO;
@@ -32,6 +34,7 @@ namespace MathNet.Numerics.LinearAlgebra.Complex32.IO
     /// <summary>
     /// Creates matrices from Matlab files.
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class MatlabMatrixReader : MatlabMatrixReader<Numerics.Complex32>
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/Double/IO/DelimitedReader.cs b/src/Numerics.IO/LinearAlgebra/Double/IO/DelimitedReader.cs
index 13cb5605..54b73f98 100644
--- a/src/Numerics.IO/LinearAlgebra/Double/IO/DelimitedReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/Double/IO/DelimitedReader.cs
@@ -35,6 +35,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double.IO
     /// specify a delimiter, then any whitespace is used.
     /// </summary>
     /// <typeparam name="TMatrix">The type of the matrix to return.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Text instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class DelimitedReader<TMatrix> : DelimitedReader<TMatrix, double>
         where TMatrix : Matrix<double>
     {
diff --git a/src/Numerics.IO/LinearAlgebra/Double/IO/MatlabReader.cs b/src/Numerics.IO/LinearAlgebra/Double/IO/MatlabReader.cs
index b502929a..fd85a6e8 100644
--- a/src/Numerics.IO/LinearAlgebra/Double/IO/MatlabReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/Double/IO/MatlabReader.cs
@@ -24,6 +24,8 @@
 // OTHER DEALINGS IN THE SOFTWARE.
 // </copyright>
 
+using System;
+
 namespace MathNet.Numerics.LinearAlgebra.Double.IO
 {
     using System.IO;
@@ -32,6 +34,7 @@ namespace MathNet.Numerics.LinearAlgebra.Double.IO
     /// <summary>
     /// Creates matrices from Matlab files.
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class MatlabMatrixReader : MatlabMatrixReader<double>
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/IO/DelimitedReader.cs b/src/Numerics.IO/LinearAlgebra/IO/DelimitedReader.cs
index 08106489..4fa808f9 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/DelimitedReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/DelimitedReader.cs
@@ -43,6 +43,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO
     /// </summary>
     /// <typeparam name="TMatrix">The type of the matrix to return.</typeparam>
     /// <typeparam name="TDataType">The data type of the Matrix. It can be either: double, float, Complex, or Complex32.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Text instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class DelimitedReader<TMatrix, TDataType> : MatrixReader<TMatrix, TDataType>
         where TMatrix : Matrix<TDataType>
         where TDataType : struct, IEquatable<TDataType>, IFormattable
diff --git a/src/Numerics.IO/LinearAlgebra/IO/DelimitedWriter.cs b/src/Numerics.IO/LinearAlgebra/IO/DelimitedWriter.cs
index b72cdd80..4ee0509e 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/DelimitedWriter.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/DelimitedWriter.cs
@@ -38,6 +38,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO
     /// Writes an <see cref="Matrix{TDataType}"/> to delimited text file. If the user does not
     /// specify a delimiter, a tab separator is used.
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Text instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class DelimitedWriter : MatrixWriter
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/IO/Matlab/Adler32.cs b/src/Numerics.IO/LinearAlgebra/IO/Matlab/Adler32.cs
index eac7721c..c09db775 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/Matlab/Adler32.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/Matlab/Adler32.cs
@@ -53,8 +53,11 @@
 
 */
 
+using System;
+
 namespace MathNet.Numerics.LinearAlgebra.IO.Matlab
 {
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     internal static class Adler32
     {
         /* largest prime smaller than 65536 */
diff --git a/src/Numerics.IO/LinearAlgebra/IO/Matlab/ArrayClass.cs b/src/Numerics.IO/LinearAlgebra/IO/Matlab/ArrayClass.cs
index 174dcda0..fedf313a 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/Matlab/ArrayClass.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/Matlab/ArrayClass.cs
@@ -26,11 +26,14 @@
 // OTHER DEALINGS IN THE SOFTWARE.
 // </copyright>
 
+using System;
+
 namespace MathNet.Numerics.LinearAlgebra.IO.Matlab
 {
     /// <summary>
     /// Enumeration for the Matlab array types
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     internal enum ArrayClass : byte
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/IO/Matlab/ArrayFlags.cs b/src/Numerics.IO/LinearAlgebra/IO/Matlab/ArrayFlags.cs
index 621d6603..91366984 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/Matlab/ArrayFlags.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/Matlab/ArrayFlags.cs
@@ -34,6 +34,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO.Matlab
     /// Matlab Array Flags
     /// </summary>
     [Flags]
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     internal enum ArrayFlags
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/IO/Matlab/DataType.cs b/src/Numerics.IO/LinearAlgebra/IO/Matlab/DataType.cs
index 2938e444..393ebcd2 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/Matlab/DataType.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/Matlab/DataType.cs
@@ -26,11 +26,14 @@
 // OTHER DEALINGS IN THE SOFTWARE.
 // </copyright>
 
+using System;
+
 namespace MathNet.Numerics.LinearAlgebra.IO.Matlab
 {
     /// <summary>
     /// Matlab data types
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     internal enum DataType
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/IO/Matlab/MatlabFile.cs b/src/Numerics.IO/LinearAlgebra/IO/Matlab/MatlabFile.cs
index 482395a7..75981099 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/Matlab/MatlabFile.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/Matlab/MatlabFile.cs
@@ -36,6 +36,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO.Matlab
     /// Represents a Matlab file
     /// </summary>
     /// <typeparam name="TDataType">The data type of the matrix to return.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     internal class MatlabFile<TDataType> where TDataType : struct, IEquatable<TDataType>, IFormattable 
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/IO/Matlab/MatlabParser.cs b/src/Numerics.IO/LinearAlgebra/IO/Matlab/MatlabParser.cs
index 7c8cbdf6..3631a78d 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/Matlab/MatlabParser.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/Matlab/MatlabParser.cs
@@ -42,6 +42,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO.Matlab
     /// Parse a Matlab file
     /// </summary>
     /// <typeparam name="TDataType">The data type of the matrix.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     internal class MatlabParser<TDataType>
         where TDataType : struct, IEquatable<TDataType>, IFormattable
     {
diff --git a/src/Numerics.IO/LinearAlgebra/IO/MatlabReader.cs b/src/Numerics.IO/LinearAlgebra/IO/MatlabReader.cs
index 41aeb7e1..5a7a639e 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/MatlabReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/MatlabReader.cs
@@ -40,6 +40,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO
     /// Creates matrices from Matlab files.
     /// </summary>
     /// <typeparam name="TDataType">The data type of the Matrix. It can be either: double, float, Complex, or Complex32.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class MatlabMatrixReader<TDataType> where TDataType : struct, IEquatable<TDataType>, IFormattable
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/IO/MatlabWriter.cs b/src/Numerics.IO/LinearAlgebra/IO/MatlabWriter.cs
index 73eb9944..4824a7dc 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/MatlabWriter.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/MatlabWriter.cs
@@ -42,6 +42,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO
     /// <summary>
     /// Writes matrices to a Matlab file.
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class MatlabMatrixWriter : IDisposable
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/IO/MatrixReader.cs b/src/Numerics.IO/LinearAlgebra/IO/MatrixReader.cs
index 25001bc2..e30e9485 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/MatrixReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/MatrixReader.cs
@@ -36,6 +36,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO
     /// </summary>
     /// <typeparam name="TMatrix">The type of Matrix to return.</typeparam>
     /// <typeparam name="TDataType">The data type of the Matrix. It can be either: double, float, Complex, or Complex32.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Text instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public abstract class MatrixReader<TMatrix, TDataType>
         where TMatrix : Matrix<TDataType>
         where TDataType : struct, IEquatable<TDataType>, IFormattable
diff --git a/src/Numerics.IO/LinearAlgebra/IO/MatrixWriter.cs b/src/Numerics.IO/LinearAlgebra/IO/MatrixWriter.cs
index 3dd7f46a..214115e1 100644
--- a/src/Numerics.IO/LinearAlgebra/IO/MatrixWriter.cs
+++ b/src/Numerics.IO/LinearAlgebra/IO/MatrixWriter.cs
@@ -37,6 +37,7 @@ namespace MathNet.Numerics.LinearAlgebra.IO
     /// <summary>
     /// Base class to write a single <see cref="Matrix{DataType}"/> to a file or stream.
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Text instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public abstract class MatrixWriter
     {
         /// <summary>
diff --git a/src/Numerics.IO/LinearAlgebra/Single/IO/DelimitedReader.cs b/src/Numerics.IO/LinearAlgebra/Single/IO/DelimitedReader.cs
index 8f689c04..9b69faee 100644
--- a/src/Numerics.IO/LinearAlgebra/Single/IO/DelimitedReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/Single/IO/DelimitedReader.cs
@@ -35,6 +35,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single.IO
     /// specify a delimiter, then any whitespace is used.
     /// </summary>
     /// <typeparam name="TMatrix">The type of the matrix to return.</typeparam>
+    [Obsolete("Use MathNet.Numerics.Data.Text instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class DelimitedReader<TMatrix> : DelimitedReader<TMatrix, float>
         where TMatrix : Matrix<float>
     {
diff --git a/src/Numerics.IO/LinearAlgebra/Single/IO/MatlabReader.cs b/src/Numerics.IO/LinearAlgebra/Single/IO/MatlabReader.cs
index 9544af0b..94bbcd4f 100644
--- a/src/Numerics.IO/LinearAlgebra/Single/IO/MatlabReader.cs
+++ b/src/Numerics.IO/LinearAlgebra/Single/IO/MatlabReader.cs
@@ -24,6 +24,8 @@
 // OTHER DEALINGS IN THE SOFTWARE.
 // </copyright>
 
+using System;
+
 namespace MathNet.Numerics.LinearAlgebra.Single.IO
 {
     using System.IO;
@@ -32,6 +34,7 @@ namespace MathNet.Numerics.LinearAlgebra.Single.IO
     /// <summary>
     /// Creates matrices from Matlab files.
     /// </summary>
+    [Obsolete("Use MathNet.Numerics.Data.Matlab instead (separate NuGet package). Scheduled for removal in v3.0.")]
     public class MatlabMatrixReader : MatlabMatrixReader<float>
     {
         /// <summary>