Fix build warnings in CA snippets

docs/fundamentals/code-analysis/quality-rules/ca1060.md

@@ -73,7 +73,7 @@ The following example shows an **Interaction.Beep** method that wraps the **Mess
 
 ## SafeNativeMethods example
 
-P/Invoke methods that can be safely exposed to any application and that do not have any side effects should be put in a class that is named **SafeNativeMethods**. You do not have to demand permissions and you do not have to pay much attention to where they are called from.
+P/Invoke methods that can be safely exposed to any application and that do not have any side effects should be put in a class that is named **SafeNativeMethods**. You do not have to pay much attention to where they are called from.
 
 The following example shows an **Environment.TickCount** property that wraps the **GetTickCount** function from kernel32.dll.
 
@@ -83,7 +83,7 @@ The following example shows an **Environment.TickCount** property that wraps the
 
 ## UnsafeNativeMethods example
 
-P/Invoke methods that cannot be safely called and that could cause side effects should be put in a class that is named **UnsafeNativeMethods**. These methods should be rigorously checked to make sure that they are not exposed to the user unintentionally. Alternatively, the methods should have another permission that is demanded instead of **UnmanagedCode** when they use them.
+P/Invoke methods that cannot be safely called and that could cause side effects should be put in a class that is named **UnsafeNativeMethods**. These methods should be rigorously checked to make sure that they are not exposed to the user unintentionally.
 
 The following example shows a **Cursor.Hide** method that wraps the **ShowCursor** function from user32.dll.
 

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/.editorconfig

@@ -0,0 +1,11 @@
+# All files
+[*]
+
+# CS0659: Type overrides Object.Equals(object o) but does not override Object.GetHashCode()
+dotnet_diagnostic.CS0659.severity = suggestion
+
+# CS0108: Member hides inherited member; missing new keyword
+dotnet_diagnostic.CS0108.severity = suggestion
+
+# CA1822: Mark members as static
+dotnet_diagnostic.CA1822.severity = none

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/all-rules.csproj

@@ -11,4 +11,8 @@
     <PackageReference Include="System.Security.Permissions" Version="5.0.0" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Include=".editorconfig" />
+  </ItemGroup>
+
 </Project>

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/ca1060.cs

@@ -62,14 +62,8 @@ internal static class SafeNativeMethods
     //<snippet4>
     public static class Cursor
     {
-        // Callers do not require UnmanagedCode permission, however,       
-        // they do require UIPermissionWindow.AllWindows.    
         public static void Hide()
         {
-            // Need to demand an appropriate permission           
-            // in place of UnmanagedCode permission as            
-            // ShowCursor is not considered a safe method.       
-            new UIPermission(UIPermissionWindow.AllWindows).Demand();
             UnsafeNativeMethods.ShowCursor(false);
         }
     }

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/ca1802.cs

@@ -1,4 +1,6 @@
-namespace ca1802
+using System;
+
+namespace ca1802
 {
     //<snippet1>
     // This class violates the rule.
@@ -7,6 +9,11 @@ public class UseReadOnly
         static readonly int x = 3;
         static readonly double y = x + 2.1;
         static readonly string s = "readonly";
+
+        public void Print()
+        {
+            Console.WriteLine(s);
+        }
     }
 
     // This class satisfies the rule.

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/ca1810.cs

@@ -1,4 +1,5 @@
-using System.Reflection;
+using System;
+using System.Reflection;
 using System.Resources;
 
 namespace ca1810
@@ -16,6 +17,11 @@ static StaticConstructor()
                new ResourceManager("strings", Assembly.GetExecutingAssembly());
             resourceString = stringManager.GetString("string");
         }
+
+        public void Print()
+        {
+            Console.WriteLine(someInteger);
+        }
     }
 
     public class NoStaticConstructor
@@ -29,6 +35,11 @@ static string InitializeResourceString()
                new ResourceManager("strings", Assembly.GetExecutingAssembly());
             return stringManager.GetString("string");
         }
+
+        public void Print()
+        {
+            Console.WriteLine(someInteger);
+        }
     }
     //</snippet1>
 }

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/ca2109.cs

@@ -3,6 +3,7 @@
 
 namespace ca2109
 {
+#pragma warning disable SYSLIB0003
     //<snippet1>
     public class HandleEvents
     {
@@ -21,4 +22,5 @@ public static void SomeActionHappened(Object sender, EventArgs e)
         }
     }
     //</snippet1>
+#pragma warning restore SYSLIB0003
 }

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/ca2229.cs

@@ -26,8 +26,6 @@ protected SerializationConstructorsRequired(
         }
 
         // The following method serializes the instance.
-        [SecurityPermission(SecurityAction.LinkDemand,
-            Flags = SecurityPermissionFlag.SerializationFormatter)]
         void ISerializable.GetObjectData(SerializationInfo info,
            StreamingContext context)
         {

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/ca2237.cs

@@ -20,8 +20,6 @@ protected BaseType(
             baseValue = info.GetInt32("baseValue");
         }
 
-        [SecurityPermissionAttribute(SecurityAction.Demand,
-            SerializationFormatter = true)]
         public virtual void GetObjectData(
            SerializationInfo info, StreamingContext context)
         {

docs/fundamentals/code-analysis/quality-rules/snippets/csharp/all-rules/ca2242.cs

@@ -5,7 +5,7 @@ namespace ca2242
     //<snippet1>
     class NaNTests
     {
-        static double zero;
+        static double zero = 0;
 
         static void Main()
         {