namespace System.CodeDom.Compiler
{
    public abstract class CodeGenerator : ICodeGenerator
    {
        protected void GenerateStatements(CodeStatementCollection stms) {}
    }
}

namespace System.Diagnostics
{
    public class StackTrace
    {
        public StackFrame(bool fNeedFileInfo) { }
        public StackFrame(int skipFrames, bool fNeedFileInfo) { }
    }
}

namespace System.Net
{
    public class NetworkCredential : ICredentials, ICredentialsByHost
    {
        public NetworkCredential GetCredential(string host, int port, string authType){}
    }
    public class IPAddress
    {
        public static System.Net.IPAddress Parse(System.ReadOnlySpan<char> ipString) { throw null; }
        public static bool TryParse(ReadOnlySpan<char> ipString, out IPAddress address);
    }
}

namespace System
{
    public static class StringNormalizationExtensions
    {
        public static bool IsNormalized(this string value) {  }
        public static bool IsNormalized(this string value, System.Text.NormalizationForm normalizationForm) { }
        public static string Normalize(this string value) {  }
        public static string Normalize(this string value, System.Text.NormalizationForm normalizationForm) {  }
    }
}

namespace System.IO.IsolatedStorage
{
    public class IsolatedStorageFileStream : FileStream
    {
        public override IAsyncResult BeginRead(byte[] buffer, int offset, int numBytes, AsyncCallback userCallback, object stateObject);
       public override IAsyncResult BeginWrite(byte[] buffer, int offset, int numBytes, AsyncCallback userCallback, object stateObject);
    }
}
namespace System.ComponentModel
{
    public sealed class ParenthesizePropertyNameAttribute : Attribute
    {
        public override bool Equals(object o);
    }
    public sealed class RefreshPropertiesAttribute : Attribute
    {
        public override bool Equals(object value);
    }
}

namespace System.Drawing
{
    public sealed class Icon : MarshalByRefObject, ICloneable, IDisposable, ISerializable
    {
        void System.Runtime.Serialization.ISerializable.GetObjectData(SerializationInfo info, StreamingContext context);
    }
    public abstract class Image : MarshalByRefObject, ICloneable, IDisposable, ISerializable
    {
        void System.Runtime.Serialization.ISerializable.GetObjectData(SerializationInfo info, StreamingContext context);
    }
}

namespace System.CodeDom.Compiler
{
    public abstract class CodeGenerator : ICodeGenerator
    {
        protected void GenerateStatements(CodeStatementCollection stmts) {}
    }
}

namespace System.Diagnostics
{
    public class StackTrace
    {
        public StackFrame(bool needFileInfo) { }
        public StackFrame(int skipFrames, bool needFileInfo) { }
    }
}

namespace System.Net
{
    public class NetworkCredential : ICredentials, ICredentialsByHost
    {
        public NetworkCredential GetCredential(string host, int port, string authenticationType){ }
    }
    public class IPAddress
    {
        public static System.Net.IPAddress Parse(System.ReadOnlySpan<char> ipSpan) { }
        public static bool TryParse(ReadOnlySpan<char> ipSpan, out IPAddress address) { }
    }
}

namespace System
{
    public static class StringNormalizationExtensions
    {
        public static bool IsNormalized(this string strInput) {  }
        public static bool IsNormalized(this string strInput, System.Text.NormalizationForm normalizationForm) { }
        public static string Normalize(this string strInput) {  }
        public static string Normalize(this string strInput, System.Text.NormalizationForm normalizationForm) { }
    }
}

namespace System.IO.IsolatedStorage
{
    public class IsolatedStorageFileStream : FileStream
    {
        public override IAsyncResult BeginRead(byte[] array, int offset, int numBytes, AsyncCallback userCallback, object stateObject);
       public override IAsyncResult BeginWrite(byte[] array, int offset, int numBytes, AsyncCallback userCallback, object stateObject);
    }
}

namespace System.ComponentModel
{
    public sealed class ParenthesizePropertyNameAttribute : Attribute
    {
        public override bool Equals(object obj);
    }
    public sealed class RefreshPropertiesAttribute : Attribute
    {
        public override bool Equals(object obj);
    }
}

namespace System.Drawing
{
    public sealed class Icon : MarshalByRefObject, ICloneable, IDisposable, ISerializable
    {
        void System.Runtime.Serialization.ISerializable.GetObjectData(SerializationInfo si, StreamingContext context);
    }
    public abstract class Image : MarshalByRefObject, ICloneable, IDisposable, ISerializable
    {
        void System.Runtime.Serialization.ISerializable.GetObjectData(SerializationInfo si, StreamingContext context);
    }
}