diff --git a/SqlMarshal.Tests/CrudGenerationTests.cs b/SqlMarshal.Tests/CrudGenerationTests.cs
index 7176516..a531f62 100644
--- a/SqlMarshal.Tests/CrudGenerationTests.cs
+++ b/SqlMarshal.Tests/CrudGenerationTests.cs
@@ -339,6 +339,164 @@ public partial void DeleteById(int id)
             command.ExecuteNonQuery();
         }
     }
+}";
+        Assert.AreEqual(expectedOutput, output);
+    }
+
+    [TestMethod]
+    public void Update_void_Sync()
+    {
+        string source = @"
+#nullable enable
+namespace Foo
+{
+    class TestEntity
+    {
+        public int Id { get; set; }
+
+        public string Name { get; set; }
+
+        public string Description { get; set; }
+    }
+    
+    [Repository(typeof(TestEntity))]
+    partial class C
+    {
+        private DbConnection connection;
+
+        public partial void Update(int id, string name, string description);
+    }
+}";
+        string output = this.GetGeneratedOutput(source, NullableContextOptions.Disable);
+
+        Assert.IsNotNull(output);
+
+        var expectedOutput = @"// <auto-generated>
+// Code generated by Stored Procedures Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+#nullable enable
+#pragma warning disable 1591
+
+namespace Foo
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Data.Common;
+    using System.Linq;
+
+    partial class C
+    {
+        public partial void Update(int id, string name, string description)
+        {
+            var connection = this.connection;
+            using var command = connection.CreateCommand();
+
+            var idParameter = command.CreateParameter();
+            idParameter.ParameterName = ""@id"";
+            idParameter.Value = id;
+
+            var nameParameter = command.CreateParameter();
+            nameParameter.ParameterName = ""@name"";
+            nameParameter.Value = name == null ? (object)DBNull.Value : name;
+
+            var descriptionParameter = command.CreateParameter();
+            descriptionParameter.ParameterName = ""@description"";
+            descriptionParameter.Value = description == null ? (object)DBNull.Value : description;
+
+            var parameters = new DbParameter[]
+            {
+                idParameter,
+                nameParameter,
+                descriptionParameter,
+            };
+
+            var sqlQuery = @""UPDATE TestEntity SET Name = @name, Description = @description WHERE Id = @id"";
+            command.CommandText = sqlQuery;
+            command.Parameters.AddRange(parameters);
+            command.ExecuteNonQuery();
+        }
+    }
+}";
+        Assert.AreEqual(expectedOutput, output);
+    }
+
+    [TestMethod]
+    public void Insert_void_Sync()
+    {
+        string source = @"
+#nullable enable
+namespace Foo
+{
+    class TestEntity
+    {
+        public int Id { get; set; }
+
+        public string Name { get; set; }
+
+        public string Description { get; set; }
+    }
+    
+    [Repository(typeof(TestEntity))]
+    partial class C
+    {
+        private DbConnection connection;
+
+        public partial void Insert(int id, string name, string description);
+    }
+}";
+        string output = this.GetGeneratedOutput(source, NullableContextOptions.Disable);
+
+        Assert.IsNotNull(output);
+
+        var expectedOutput = @"// <auto-generated>
+// Code generated by Stored Procedures Code Generator.
+// Changes may cause incorrect behavior and will be lost if the code is
+// regenerated.
+// </auto-generated>
+#nullable enable
+#pragma warning disable 1591
+
+namespace Foo
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Data.Common;
+    using System.Linq;
+
+    partial class C
+    {
+        public partial void Insert(int id, string name, string description)
+        {
+            var connection = this.connection;
+            using var command = connection.CreateCommand();
+
+            var idParameter = command.CreateParameter();
+            idParameter.ParameterName = ""@id"";
+            idParameter.Value = id;
+
+            var nameParameter = command.CreateParameter();
+            nameParameter.ParameterName = ""@name"";
+            nameParameter.Value = name == null ? (object)DBNull.Value : name;
+
+            var descriptionParameter = command.CreateParameter();
+            descriptionParameter.ParameterName = ""@description"";
+            descriptionParameter.Value = description == null ? (object)DBNull.Value : description;
+
+            var parameters = new DbParameter[]
+            {
+                idParameter,
+                nameParameter,
+                descriptionParameter,
+            };
+
+            var sqlQuery = @""INSERT INTO TestEntity(Id, Name, Description) VALUES (@id, @name, @description)"";
+            command.CommandText = sqlQuery;
+            command.Parameters.AddRange(parameters);
+            command.ExecuteNonQuery();
+        }
+    }
 }";
         Assert.AreEqual(expectedOutput, output);
     }
diff --git a/SqlMarshal/Extensions.cs b/SqlMarshal/Extensions.cs
index 34b1d4e..310fad7 100644
--- a/SqlMarshal/Extensions.cs
+++ b/SqlMarshal/Extensions.cs
@@ -179,6 +179,17 @@ internal static ITypeSymbol UnwrapListItem(ITypeSymbol returnType)
 
     internal static IPropertySymbol? FindIdMember(this ITypeSymbol returnType)
     {
-        return returnType.GetMembers().OfType<IPropertySymbol>().FirstOrDefault(_ => _.Name == "Id");
+        return returnType.GetMembers().OfType<IPropertySymbol>().FirstOrDefault(FindIdMember);
+    }
+
+    internal static bool FindIdMember(this IPropertySymbol propertySymbol)
+    {
+        return propertySymbol.Name == "Id";
+    }
+
+    internal static IPropertySymbol? FindMember(this ITypeSymbol returnType, string parameterName)
+    {
+        return returnType.GetMembers().OfType<IPropertySymbol>()
+            .FirstOrDefault(propertySymbol => string.Equals(propertySymbol.Name, parameterName, System.StringComparison.InvariantCultureIgnoreCase));
     }
 }
diff --git a/SqlMarshal/Generator.cs b/SqlMarshal/Generator.cs
index c041ea9..03336e0 100644
--- a/SqlMarshal/Generator.cs
+++ b/SqlMarshal/Generator.cs
@@ -7,6 +7,7 @@
 namespace SqlMarshal;
 
 using System.Collections.Generic;
+using System.Data.Common;
 using System.Linq;
 using System.Reflection.Metadata;
 using System.Text;
@@ -64,7 +65,11 @@ public RepositoryAttribute(global::System.Type entityType)
 
     private static DiagnosticDescriptor SP0002 { get; } = new DiagnosticDescriptor("SP0002", "No repository attribute", "Internal analyzer error.", "Internal", DiagnosticSeverity.Error, true);
 
-    private static DiagnosticDescriptor SP0003 { get; } = new DiagnosticDescriptor("SP0002", "Id property cannot be guessed", "Cannot find id property for entity type {0}.", "SqlMarshal", DiagnosticSeverity.Error, true);
+    private static DiagnosticDescriptor SP0003 { get; } = new DiagnosticDescriptor("SP0003", "Id property cannot be guessed", "Cannot find id property for entity type {0}.", "SqlMarshal", DiagnosticSeverity.Error, true);
+
+    private static DiagnosticDescriptor SP0004 { get; } = new DiagnosticDescriptor("SP0004", "Entity property corresponding to parameter cannot be guessed", "Cannot find property in entity type {0} corresponding to parameter {1}.", "SqlMarshal", DiagnosticSeverity.Error, true);
+
+    private static DiagnosticDescriptor SP0005 { get; } = new DiagnosticDescriptor("SP0005", "Unknown method for generation", "Unknown method {0} for generation.", "SqlMarshal", DiagnosticSeverity.Error, true);
 
     /// <inheritdoc/>
     public void Initialize(GeneratorInitializationContext context)
@@ -809,7 +814,7 @@ private void MapResults(
 
             builder.Append(" FROM ");
             builder.Append(entityType.Name);
-            AppendFitlerById(builder);
+            AppendFilterById(builder);
             return builder.ToString();
         }
 
@@ -834,13 +839,99 @@ private void MapResults(
             var builder = new StringBuilder();
             builder.Append("DELETE FROM ");
             builder.Append(entityType.Name);
-            AppendFitlerById(builder);
+            AppendFilterById(builder);
+            return builder.ToString();
+        }
+
+        if (canonicalOperationName == "Update")
+        {
+            var builder = new StringBuilder();
+            builder.Append("UPDATE ");
+            builder.Append(entityType.Name);
+            builder.Append(" SET ");
+            bool first = true;
+            foreach (var parameter in methodGenerationContext.SqlParameters)
+            {
+                if (parameter.Name == "id")
+                {
+                    continue;
+                }
+
+                if (!first)
+                {
+                    builder.Append(", ");
+                }
+
+                var entityProperty = entityType.FindMember(parameter.Name);
+                if (entityProperty == null)
+                {
+                    methodGenerationContext.ClassGenerationContext.GeneratorExecutionContext.ReportDiagnostic(Diagnostic.Create(SP0004, parameter.Locations.FirstOrDefault(), entityType.ToDisplayString(), parameter.Name));
+                    continue;
+                }
+
+                builder.Append(entityProperty.Name);
+                builder.Append(" = ");
+                builder.Append("@" + NameMapper.MapName(parameter.Name));
+                first = false;
+            }
+
+            AppendFilterById(builder);
+            return builder.ToString();
+        }
+
+        if (canonicalOperationName == "Insert")
+        {
+            var builder = new StringBuilder();
+            builder.Append("INSERT INTO ");
+            builder.Append(entityType.Name);
+            builder.Append("(");
+            bool first = true;
+            foreach (var parameter in methodGenerationContext.SqlParameters)
+            {
+                if (!first)
+                {
+                    builder.Append(", ");
+                }
+
+                var entityProperty = entityType.FindMember(parameter.Name);
+                if (entityProperty == null)
+                {
+                    methodGenerationContext.ClassGenerationContext.GeneratorExecutionContext.ReportDiagnostic(Diagnostic.Create(SP0004, parameter.Locations.FirstOrDefault(), entityType.ToDisplayString(), parameter.Name));
+                    continue;
+                }
+
+                builder.Append(entityProperty.Name);
+                first = false;
+            }
+
+            builder.Append(") VALUES (");
+            first = true;
+            foreach (var parameter in methodGenerationContext.SqlParameters)
+            {
+                if (!first)
+                {
+                    builder.Append(", ");
+                }
+
+                var entityProperty = entityType.FindMember(parameter.Name);
+                if (entityProperty == null)
+                {
+                    methodGenerationContext.ClassGenerationContext.GeneratorExecutionContext.ReportDiagnostic(Diagnostic.Create(SP0004, parameter.Locations.FirstOrDefault(), entityType.ToDisplayString(), parameter.Name));
+                    continue;
+                }
+
+                builder.Append("@" + NameMapper.MapName(parameter.Name));
+                first = false;
+            }
+
+            builder.Append(")");
             return builder.ToString();
         }
 
+        methodGenerationContext.ClassGenerationContext.GeneratorExecutionContext.ReportDiagnostic(Diagnostic.Create(SP0005, methodGenerationContext.MethodSymbol.Locations.FirstOrDefault(), methodGenerationContext.MethodSymbol.ToDisplayString()));
         return null;
 
-        void AppendFitlerById(StringBuilder builder)
+        void AppendFilterById(StringBuilder builder)
         {
             builder.Append(" WHERE ");
             var idMember = entityType.FindIdMember();