using System;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;

namespace System
{
	/// <summary>Represents a nonexistent value. This class cannot be inherited.</summary>
	/// <filterpriority>1</filterpriority>
	// Token: 0x02000651 RID: 1617
	[ComVisible(true)]
	[Serializable]
	public sealed class DBNull : IConvertible, ISerializable
	{
		// Token: 0x06003D0B RID: 15627 RVA: 0x000CDA54 File Offset: 0x000CBC54
		private DBNull()
		{
		}

		// Token: 0x06003D0C RID: 15628 RVA: 0x000CDA5C File Offset: 0x000CBC5C
		private DBNull(SerializationInfo info, StreamingContext context)
		{
			throw new NotSupportedException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D0E RID: 15630 RVA: 0x000CDA78 File Offset: 0x000CBC78
		bool IConvertible.ToBoolean(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D0F RID: 15631 RVA: 0x000CDA80 File Offset: 0x000CBC80
		byte IConvertible.ToByte(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D10 RID: 15632 RVA: 0x000CDA88 File Offset: 0x000CBC88
		char IConvertible.ToChar(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D11 RID: 15633 RVA: 0x000CDA90 File Offset: 0x000CBC90
		DateTime IConvertible.ToDateTime(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D12 RID: 15634 RVA: 0x000CDA98 File Offset: 0x000CBC98
		decimal IConvertible.ToDecimal(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D13 RID: 15635 RVA: 0x000CDAA0 File Offset: 0x000CBCA0
		double IConvertible.ToDouble(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D14 RID: 15636 RVA: 0x000CDAA8 File Offset: 0x000CBCA8
		short IConvertible.ToInt16(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D15 RID: 15637 RVA: 0x000CDAB0 File Offset: 0x000CBCB0
		int IConvertible.ToInt32(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D16 RID: 15638 RVA: 0x000CDAB8 File Offset: 0x000CBCB8
		long IConvertible.ToInt64(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D17 RID: 15639 RVA: 0x000CDAC0 File Offset: 0x000CBCC0
		sbyte IConvertible.ToSByte(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D18 RID: 15640 RVA: 0x000CDAC8 File Offset: 0x000CBCC8
		float IConvertible.ToSingle(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>Converts the current <see cref="T:System.DBNull" /> object to the specified type.</summary>
		/// <returns>The boxed equivalent of the current <see cref="T:System.DBNull" /> object, if that conversion is supported; otherwise, an exception is thrown and no value is returned. </returns>
		/// <param name="type">The type to convert the current <see cref="T:System.DBNull" /> object to. </param>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface and is used to augment the conversion. If null is specified, format information is obtained from the current culture. </param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		/// <exception cref="T:System.ArgumentNullException">
		///   <paramref name="type" /> is null.</exception>
		// Token: 0x06003D19 RID: 15641 RVA: 0x000CDAD0 File Offset: 0x000CBCD0
		object IConvertible.ToType(Type targetType, IFormatProvider provider)
		{
			if (targetType == typeof(string))
			{
				return string.Empty;
			}
			if (targetType == typeof(DBNull))
			{
				return this;
			}
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D1A RID: 15642 RVA: 0x000CDB00 File Offset: 0x000CBD00
		ushort IConvertible.ToUInt16(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D1B RID: 15643 RVA: 0x000CDB08 File Offset: 0x000CBD08
		uint IConvertible.ToUInt32(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>This conversion is not supported. Attempting to make this conversion throws an <see cref="T:System.InvalidCastException" />.</summary>
		/// <returns>None. The return value for this member is not used.</returns>
		/// <param name="provider">An object that implements the <see cref="T:System.IFormatProvider" /> interface. (This parameter is not used; specify null.)</param>
		/// <exception cref="T:System.InvalidCastException">This conversion is not supported for the <see cref="T:System.DBNull" /> type.</exception>
		// Token: 0x06003D1C RID: 15644 RVA: 0x000CDB10 File Offset: 0x000CBD10
		ulong IConvertible.ToUInt64(IFormatProvider provider)
		{
			throw new InvalidCastException();
		}

		/// <summary>Implements the <see cref="T:System.Runtime.Serialization.ISerializable" /> interface and returns the data needed to serialize the <see cref="T:System.DBNull" /> object.</summary>
		/// <param name="info">A <see cref="T:System.Runtime.Serialization.SerializationInfo" /> object containing information required to serialize the <see cref="T:System.DBNull" /> object. </param>
		/// <param name="context">A <see cref="T:System.Runtime.Serialization.StreamingContext" /> object containing the source and destination of the serialized stream associated with the <see cref="T:System.DBNull" /> object. </param>
		/// <exception cref="T:System.ArgumentNullException">
		///   <paramref name="info" /> is null. </exception>
		/// <filterpriority>2</filterpriority>
		// Token: 0x06003D1D RID: 15645 RVA: 0x000CDB18 File Offset: 0x000CBD18
		public void GetObjectData(SerializationInfo info, StreamingContext context)
		{
			UnitySerializationHolder.GetDBNullData(this, info, context);
		}

		/// <summary>Gets the <see cref="T:System.TypeCode" /> value for <see cref="T:System.DBNull" />.</summary>
		/// <returns>The <see cref="T:System.TypeCode" /> value for <see cref="T:System.DBNull" />, which is <see cref="F:System.TypeCode.DBNull" />.</returns>
		/// <filterpriority>2</filterpriority>
		// Token: 0x06003D1E RID: 15646 RVA: 0x000CDB24 File Offset: 0x000CBD24
		public TypeCode GetTypeCode()
		{
			return TypeCode.DBNull;
		}

		/// <summary>Returns an empty string (<see cref="F:System.String.Empty" />).</summary>
		/// <returns>An empty string (<see cref="F:System.String.Empty" />).</returns>
		/// <filterpriority>2</filterpriority>
		// Token: 0x06003D1F RID: 15647 RVA: 0x000CDB28 File Offset: 0x000CBD28
		public override string ToString()
		{
			return string.Empty;
		}

		/// <summary>Returns an empty string using the specified <see cref="T:System.IFormatProvider" />.</summary>
		/// <returns>An empty string (<see cref="F:System.String.Empty" />).</returns>
		/// <param name="provider">The <see cref="T:System.IFormatProvider" /> to be used to format the return value.-or- null to obtain the format information from the current locale setting of the operating system. </param>
		/// <filterpriority>2</filterpriority>
		// Token: 0x06003D20 RID: 15648 RVA: 0x000CDB30 File Offset: 0x000CBD30
		public string ToString(IFormatProvider provider)
		{
			return string.Empty;
		}

		/// <summary>Represents the sole instance of the <see cref="T:System.DBNull" /> class.</summary>
		/// <filterpriority>1</filterpriority>
		// Token: 0x04001892 RID: 6290
		public static readonly DBNull Value = new DBNull();
	}
}