diff --git a/crypto/src/asn1/x509/DistributionPointName.cs b/crypto/src/asn1/x509/DistributionPointName.cs
new file mode 100644
index 000000000..1a9d24241
--- /dev/null
+++ b/crypto/src/asn1/x509/DistributionPointName.cs
@@ -0,0 +1,130 @@
+using System;
+using System.Text;
+
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Asn1.X509
+{
+ /**
+ * The DistributionPointName object.
+ * <pre>
+ * DistributionPointName ::= CHOICE {
+ * fullName [0] GeneralNames,
+ * nameRelativeToCRLIssuer [1] RDN
+ * }
+ * </pre>
+ */
+ public class DistributionPointName
+ : Asn1Encodable, IAsn1Choice
+ {
+ internal readonly Asn1Encodable name;
+ internal readonly int type;
+
+ public const int FullName = 0;
+ public const int NameRelativeToCrlIssuer = 1;
+
+ public static DistributionPointName GetInstance(
+ Asn1TaggedObject obj,
+ bool explicitly)
+ {
+ return GetInstance(Asn1TaggedObject.GetInstance(obj, true));
+ }
+
+ public static DistributionPointName GetInstance(
+ object obj)
+ {
+ if (obj == null || obj is DistributionPointName)
+ {
+ return (DistributionPointName) obj;
+ }
+
+ if (obj is Asn1TaggedObject)
+ {
+ return new DistributionPointName((Asn1TaggedObject) obj);
+ }
+
+ throw new ArgumentException("unknown object in factory: " + obj.GetType().Name, "obj");
+ }
+
+ public DistributionPointName(
+ int type,
+ Asn1Encodable name)
+ {
+ this.type = type;
+ this.name = name;
+ }
+
+ public DistributionPointName(
+ GeneralNames name)
+ : this(FullName, name)
+ {
+ }
+
+ public int PointType
+ {
+ get { return type; }
+ }
+
+ public Asn1Encodable Name
+ {
+ get { return name; }
+ }
+
+ public DistributionPointName(
+ Asn1TaggedObject obj)
+ {
+ this.type = obj.TagNo;
+
+ if (type == FullName)
+ {
+ this.name = GeneralNames.GetInstance(obj, false);
+ }
+ else
+ {
+ this.name = Asn1Set.GetInstance(obj, false);
+ }
+ }
+
+ public override Asn1Object ToAsn1Object()
+ {
+ return new DerTaggedObject(false, type, name);
+ }
+
+ public override string ToString()
+ {
+ string sep = Platform.NewLine;
+ StringBuilder buf = new StringBuilder();
+ buf.Append("DistributionPointName: [");
+ buf.Append(sep);
+ if (type == FullName)
+ {
+ appendObject(buf, sep, "fullName", name.ToString());
+ }
+ else
+ {
+ appendObject(buf, sep, "nameRelativeToCRLIssuer", name.ToString());
+ }
+ buf.Append("]");
+ buf.Append(sep);
+ return buf.ToString();
+ }
+
+ private void appendObject(
+ StringBuilder buf,
+ string sep,
+ string name,
+ string val)
+ {
+ string indent = " ";
+
+ buf.Append(indent);
+ buf.Append(name);
+ buf.Append(":");
+ buf.Append(sep);
+ buf.Append(indent);
+ buf.Append(indent);
+ buf.Append(val);
+ buf.Append(sep);
+ }
+ }
+}
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