Idea by the Joy of Code.

// Using statements are outside namespace declarations
using System;
namespace Conkerjo.NamingConventions
{
    // Enums are PascalCased and singular
    public enum Alignment
    {
        // Enum members are PascalCased
        Top,
        TopRight,
        Right,
        BottomRight
        Bottom,
        BottomLeft,
        Left,
        TopLeft,
    }

    // Flag enums are PascalCased and plural
    [Flags]
    public enum Alignments
    {
        // Enum members are PascalCased
        None = 0x00,
        Top = 0x01,
        Right = 0x02,
        Bottom = 0x04,
        Left = 0x08,
    }

    // Class names are PascalCased
    public class ThisIsAClass
    {
        // Members are grouped by type:
        // * Types (nested classes, enums, structures)
        // * Fields
        // * Constructors
        // * Properties
        // * Methods
        //
        // Within these groups the elements are ordered by accessibility,
        // from public to private:
        // * public
        // * internal
        // * internal protected
        // * protected
        // * private
        // Nested classes are PascalCased
        class NestedClass : IDisposable
        {
            public void Dispose()
            {

            }
        }

        // Publc Fields and constants are PascalCased
        public const float ABitOfPi = 3.14f;

        // Fields are camelCased
        // NOTE: C# type aliases are used
        internal string internalField;

        // Fields are camelCased
        protected int protectedField;

        // Fields are camelCased
        // NOTE: C# type aliases are used
        private readonly object privateMember;

        // Properties are PascalCased
        // NOTE: Acronyms longer than 2 characters are PascalCased (e.g.
        // Html, Xml)
        public int HtmlLength { get; set; }

        // Properties are PascalCased
        // NOTE: Acronyms of 2 characters are UPPERCASED (e.g. UI, IO)
        internal string UIElementName { get; } 

        // Properties are PascalCased
        protected string ProtectedProperty { get; } 

        // Private Properties are camelCased
        private string privateProperty { get; } 

        // Methods are PascalCased
        public int Add(int oneValue, int anotherValue)
        {
            // local variables are camelCased
            double result = oneValue * anotherValue;
            return result;
        }

        // Methods are PascalCased
        // NOTE: Abbreviations are not treated as Acronyms (so
        // _Id_entification is Id, not ID).
        protected void AlignObjectById(string id, Alignment alignment)
        {
            throw new NotImplementedException();
        }
    }
}

Idea by the Joy of Code.

// Namespaces are PascalCased
namespace Bnoerj.NamingConventions
{
    // Using statements are inside namespace declarations
    using System;

    // Enums are PascalCased and singular
    public enum Alignment
    {
        // Enum members are PascalCased
        Top,
        TopRight,
        Right,
        BottomRight
        Bottom,
        BottomLeft,
        Left,
        TopLeft,
    }

    // Flag enums are PascalCased and plural
    [Flags]
    public enum Alignments
    {
        // Enum members are PascalCased
        None = 0x00,
        Top = 0x01,
        Right = 0x02,
        Bottom = 0x04,
        Left = 0x08,
    }

    // Class names are PascalCased
    public class ThisIsAClass
    {
        // Members are grouped by type:
        // * Types (nested classes, enums, structures)
        // * Fields
        // * Constructors
        // * Properties
        // * Methods
        //
        // Within these groups the elements are ordered by accessibility,
        // from public to private:
        // * public
        // * internal
        // * internal protected
        // * protected
        // * private
        // Nested classes are PascalCased
        class NestedClass : IDisposable
        {
            public void Dispose()
            {
                throw new NotImplementedException();
            }
        }

        // Publc Fields and constants are PascalCased
        public const float ABitOfPi = 3.14f;

        // Fields are camelCased
        // NOTE: C# type aliases are used
        internal string internalField;

        // Fields are camelCased
        protected int protectedField;

        // Fields are camelCased
        // NOTE: private accessibility modifier is omitted
        // NOTE: C# type aliases are used
        readonly object privateMember;

        // Properties are PascalCased
        // NOTE: Acronyms longer than 2 characters are PascalCased (e.g.
        // Html, Xml)
        public int HtmlLength { get; set; }

        // Properties are PascalCased
        // NOTE: Acronyms of 2 characters are UPPERCASED (e.g. UI, IO)
        internal string UIElementName { get; } 

        // Properties are PascalCased
        protected string ProtectedProperty { get; } 

        // Properties are PascalCased
        // NOTE: private accessibility modifier is omitted
        string PrivateProperty { get; } 

        // Methods are PascalCased
        // NOTE: private accessibility modifier is omitted
        public int Add(int oneValue, int anotherValue)
        {
            // local variables are camelCased
            double result = oneValue * anotherValue;
            return result;
        }

        // Methods are PascalCased
        // NOTE: Abbreviations are not treated as Acronyms (so
        // _Id_entification is Id, not ID).
        protected void AlignObjectById(string id, Alignment alignment)
        {
            throw new NotImplementedException();
        }
    }
}
}

Idea by the Joy of Code.