Modernize C# code snippets - System/Convert/*

snippets/csharp/System/Convert/ChangeType/changetype00.cs

@@ -1,59 +1,60 @@
 // <Snippet1>
 using System;
 using System.Globalization;
 
 public class InterceptProvider : IFormatProvider
 {
-   public object GetFormat(Type formatType)
-   {
-      if (formatType == typeof(NumberFormatInfo)) {
-         Console.WriteLine("   Returning a fr-FR numeric format provider.");
-         return new System.Globalization.CultureInfo("fr-FR").NumberFormat;
-      }
-      else if (formatType == typeof(DateTimeFormatInfo)) {
-         Console.WriteLine("   Returning an en-US date/time format provider.");
-         return new System.Globalization.CultureInfo("en-US").DateTimeFormat;
-      }
-      else {
-         Console.WriteLine("   Requesting a format provider of {0}.", formatType.Name);
-         return null;
-      }
-   }
+    public object GetFormat(Type formatType)
+    {
+        if (formatType == typeof(NumberFormatInfo))
+        {
+            Console.WriteLine("   Returning a fr-FR numeric format provider.");
+            return new System.Globalization.CultureInfo("fr-FR").NumberFormat;
+        }
+        else if (formatType == typeof(DateTimeFormatInfo))
+        {
+            Console.WriteLine("   Returning an en-US date/time format provider.");
+            return new System.Globalization.CultureInfo("en-US").DateTimeFormat;
+        }
+        else
+        {
+            Console.WriteLine($"   Requesting a format provider of {formatType.Name}.");
+            return null;
+        }
+    }
 }
 
 public class Example
 {
-   public static void Main()
-   {
-      object[] values = { 103.5d, new DateTime(2010, 12, 26, 14, 34, 0) };
-      IFormatProvider provider = new InterceptProvider();
+    public static void Main()
+    {
+        object[] values = { 103.5d, new DateTime(2010, 12, 26, 14, 34, 0) };
+        IFormatProvider provider = new InterceptProvider();
 
-      // Convert value to each of the types represented in TypeCode enum.
-      foreach (object value in values)
-      {
-         // Iterate types in TypeCode enum.
-         foreach (TypeCode enumType in ((TypeCode[]) Enum.GetValues(typeof(TypeCode))))
-         {
-            if (enumType == TypeCode.DBNull || enumType == TypeCode.Empty) continue;
+        // Convert value to each of the types represented in TypeCode enum.
+        foreach (object value in values)
+        {
+            // Iterate types in TypeCode enum.
+            foreach (TypeCode enumType in ((TypeCode[])Enum.GetValues(typeof(TypeCode))))
+            {
+                if (enumType == TypeCode.DBNull || enumType == TypeCode.Empty) continue;
 
-            try {
-               Console.WriteLine("{0} ({1}) --> {2} ({3}).",
-                                 value, value.GetType().Name,
-                                 Convert.ChangeType(value, enumType, provider),
-                                 enumType.ToString());
+                try
+                {
+                    Console.WriteLine($"{value} ({value.GetType().Name}) --> {Convert.ChangeType(value, enumType, provider)} ({enumType.ToString()}).");
+                }
+                catch (InvalidCastException)
+                {
+                    Console.WriteLine($"Cannot convert a {value.GetType().Name} to a {enumType.ToString()}");
+                }
+                catch (OverflowException)
+                {
+                    Console.WriteLine($"Overflow: {value} is out of the range of a {enumType.ToString()}");
+                }
             }
-            catch (InvalidCastException) {
-               Console.WriteLine("Cannot convert a {0} to a {1}",
-                                 value.GetType().Name, enumType.ToString());
-            }
-            catch (OverflowException) {
-               Console.WriteLine("Overflow: {0} is out of the range of a {1}",
-                                 value, enumType.ToString());
-            }
-         }
-         Console.WriteLine();
-      }
-   }
+            Console.WriteLine();
+        }
+    }
 }
 // The example displays the following output:
 //    103.5 (Double) --> 103.5 (Object).

snippets/csharp/System/Convert/ChangeType/changetype01.cs

@@ -1,18 +1,20 @@
 // <Snippet2>
 using System;
 
-public class ChangeTypeTest {
-    public static void Main() {
+public class ChangeTypeTest
+{
+    public static void Main()
+    {
 
-        Double d = -2.345;
+        double d = -2.345;
         int i = (int)Convert.ChangeType(d, TypeCode.Int32);
 
-        Console.WriteLine("The Double {0} when converted to an Int32 is {1}", d, i);
+        Console.WriteLine($"The Double {d} when converted to an Int32 is {i}");
 
         string s = "12/12/2009";
         DateTime dt = (DateTime)Convert.ChangeType(s, typeof(DateTime));
 
-        Console.WriteLine("The String {0} when converted to a Date is {1}", s, dt);
+        Console.WriteLine($"The String {s} when converted to a Date is {dt}");
     }
 }
 // The example displays the following output: