Remove existing C# sample

samples/tutorials/c#/README.md

@@ -4,7 +4,7 @@
 
 ### .NET Framework
 
-.NET Framework is pre-installed with Windows. For Linux and Mac OS X you can download .NET Framework from the [Mono Project](http://www.mono-project.com/).
+.NET Framework is pre-installed with Windows. For Linux and Mac OS X you can download [.NET Core](https://www.microsoft.com/net/core#windows).
 
 ### A SQL Database
 

samples/tutorials/c#/sample-.net-windows.cs

@@ -1,58 +0,0 @@
-using System;
-using System.Data.SqlClient;
-
-class Sample
-{
-    static void Main()
-    {
-        string connectionString = "Server=tcp:yourserver;Database=yourdatabase;User ID=yourlogin@yourserver;Password={your_password_here};Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;";
-
-        using (var conn = new SqlConnection(connectionString))
-        {
-            using (var cmd = conn.CreateCommand())
-            {
-                cmd.CommandText = @"
-                        SELECT
-                            c.CustomerID
-                            ,c.CompanyName
-                            ,COUNT(soh.SalesOrderID) AS OrderCount
-                        FROM SalesLT.Customer AS c
-                        LEFT OUTER JOIN SalesLT.SalesOrderHeader AS soh ON c.CustomerID = soh.CustomerID
-                        GROUP BY c.CustomerID, c.CompanyName
-                        ORDER BY OrderCount DESC;";
-
-                conn.Open();
-
-                using (var reader = cmd.ExecuteReader())
-                {
-                    while (reader.Read())
-                    {
-                        Console.WriteLine("ID: {0} Name: {1} Order Count: {2}", reader.GetInt32(0), reader.GetString(1), reader.GetInt32(2));
-                    }
-                }
-            }
-        }
-
-        using (var conn = new SqlConnection(connectionString))
-        {
-            using (var cmd = conn.CreateCommand())
-            {
-                cmd.CommandText = @"
-                    INSERT SalesLT.Product (Name, ProductNumber, StandardCost, ListPrice, SellStartDate)
-                    OUTPUT INSERTED.ProductID
-                    VALUES (@Name, @Number, @Cost, @Price, CURRENT_TIMESTAMP)";
-
-                cmd.Parameters.AddWithValue("@Name", "SQL Server Express");
-                cmd.Parameters.AddWithValue("@Number", "SQLEXPRESS1");
-                cmd.Parameters.AddWithValue("@Cost", 0);
-                cmd.Parameters.AddWithValue("@Price", 0);
-
-                conn.Open();
-
-                int insertedProductId = (int)cmd.ExecuteScalar();
-
-                Console.WriteLine("Product ID {0} inserted.", insertedProductId);
-            }
-        }
-    }
-}